Home / 15,931.72-21,988.16-11,470.24

Finding the Fourth Proportional to 15,931.72, 21,988.16 and 11,470.24

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Solution

The fourth proportional to 15,931.72, 21,988.16 and 11,470.24 is: 15,830.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,931.72 : 21,988.16 = 11,470.24 : x
  2. Step 2: Convert to fraction form
    15,931.72/21,988.16 = 11,470.24/x
  3. Step 3: Cross multiply
    15,931.72x = 21,988.16 × 11,470.24
  4. Step 4: Simplify right side
    15,931.72x = 252,209,472.36
  5. Step 5: Solve for x
    x = 252,209,472.36/15,931.72
  6. Step 6: Final answer
    x = 15,830.65

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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.