Home / 15,645.04-21,572.44-9,972.20

Finding the Fourth Proportional to 15,645.04, 21,572.44 and 9,972.20

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Solution

The fourth proportional to 15,645.04, 21,572.44 and 9,972.20 is: 13,750.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,645.04 : 21,572.44 = 9,972.20 : x
  2. Step 2: Convert to fraction form
    15,645.04/21,572.44 = 9,972.20/x
  3. Step 3: Cross multiply
    15,645.04x = 21,572.44 × 9,972.20
  4. Step 4: Simplify right side
    15,645.04x = 215,124,686.17
  5. Step 5: Solve for x
    x = 215,124,686.17/15,645.04
  6. Step 6: Final answer
    x = 13,750.34

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Half scale
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Double scale
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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.