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Finding the Fourth Proportional to 28,220.70, 42,329.70 and 9,498.90

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Solution

The fourth proportional to 28,220.70, 42,329.70 and 9,498.90 is: 14,247.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,220.70 : 42,329.70 = 9,498.90 : x
  2. Step 2: Convert to fraction form
    28,220.70/42,329.70 = 9,498.90/x
  3. Step 3: Cross multiply
    28,220.70x = 42,329.70 × 9,498.90
  4. Step 4: Simplify right side
    28,220.70x = 402,085,587.33
  5. Step 5: Solve for x
    x = 402,085,587.33/28,220.70
  6. Step 6: Final answer
    x = 14,247.90

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.