Home / 9,210.51-12,721.05-6,221.21

Finding the Fourth Proportional to 9,210.51, 12,721.05 and 6,221.21

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Solution

The fourth proportional to 9,210.51, 12,721.05 and 6,221.21 is: 8,592.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,210.51 : 12,721.05 = 6,221.21 : x
  2. Step 2: Convert to fraction form
    9,210.51/12,721.05 = 6,221.21/x
  3. Step 3: Cross multiply
    9,210.51x = 12,721.05 × 6,221.21
  4. Step 4: Simplify right side
    9,210.51x = 79,140,259.87
  5. Step 5: Solve for x
    x = 79,140,259.87/9,210.51
  6. Step 6: Final answer
    x = 8,592.39

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.