Home / 15,575.04-21,487.68-9,989.28

Finding the Fourth Proportional to 15,575.04, 21,487.68 and 9,989.28

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Solution

The fourth proportional to 15,575.04, 21,487.68 and 9,989.28 is: 13,781.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,575.04 : 21,487.68 = 9,989.28 : x
  2. Step 2: Convert to fraction form
    15,575.04/21,487.68 = 9,989.28/x
  3. Step 3: Cross multiply
    15,575.04x = 21,487.68 × 9,989.28
  4. Step 4: Simplify right side
    15,575.04x = 214,646,452.07
  5. Step 5: Solve for x
    x = 214,646,452.07/15,575.04
  6. Step 6: Final answer
    x = 13,781.44

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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.