Home / 28,288.50-42,432.75-9,820.50

Finding the Fourth Proportional to 28,288.50, 42,432.75 and 9,820.50

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Solution

The fourth proportional to 28,288.50, 42,432.75 and 9,820.50 is: 14,730.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,288.50 : 42,432.75 = 9,820.50 : x
  2. Step 2: Convert to fraction form
    28,288.50/42,432.75 = 9,820.50/x
  3. Step 3: Cross multiply
    28,288.50x = 42,432.75 × 9,820.50
  4. Step 4: Simplify right side
    28,288.50x = 416,710,821.38
  5. Step 5: Solve for x
    x = 416,710,821.38/28,288.50
  6. Step 6: Final answer
    x = 14,730.75

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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.