Home / 15,331.33-21,159.20-9,361.74

Finding the Fourth Proportional to 15,331.33, 21,159.20 and 9,361.74

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Solution

The fourth proportional to 15,331.33, 21,159.20 and 9,361.74 is: 12,920.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,331.33 : 21,159.20 = 9,361.74 : x
  2. Step 2: Convert to fraction form
    15,331.33/21,159.20 = 9,361.74/x
  3. Step 3: Cross multiply
    15,331.33x = 21,159.20 × 9,361.74
  4. Step 4: Simplify right side
    15,331.33x = 198,086,929.01
  5. Step 5: Solve for x
    x = 198,086,929.01/15,331.33
  6. Step 6: Final answer
    x = 12,920.40

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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.