Home / 15,663.04-21,597.28-9,990.20

Finding the Fourth Proportional to 15,663.04, 21,597.28 and 9,990.20

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Solution

The fourth proportional to 15,663.04, 21,597.28 and 9,990.20 is: 13,775.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,663.04 : 21,597.28 = 9,990.20 : x
  2. Step 2: Convert to fraction form
    15,663.04/21,597.28 = 9,990.20/x
  3. Step 3: Cross multiply
    15,663.04x = 21,597.28 × 9,990.20
  4. Step 4: Simplify right side
    15,663.04x = 215,761,146.66
  5. Step 5: Solve for x
    x = 215,761,146.66/15,663.04
  6. Step 6: Final answer
    x = 13,775.18

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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.