Home / 20,470.72-28,279.76-13,754.24

Finding the Fourth Proportional to 20,470.72, 28,279.76 and 13,754.24

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Solution

The fourth proportional to 20,470.72, 28,279.76 and 13,754.24 is: 19,001.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.72 : 28,279.76 = 13,754.24 : x
  2. Step 2: Convert to fraction form
    20,470.72/28,279.76 = 13,754.24/x
  3. Step 3: Cross multiply
    20,470.72x = 28,279.76 × 13,754.24
  4. Step 4: Simplify right side
    20,470.72x = 388,966,606.18
  5. Step 5: Solve for x
    x = 388,966,606.18/20,470.72
  6. Step 6: Final answer
    x = 19,001.12

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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.