Home / 20,470.55-28,247.06-11,521.13

Finding the Fourth Proportional to 20,470.55, 28,247.06 and 11,521.13

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Solution

The fourth proportional to 20,470.55, 28,247.06 and 11,521.13 is: 15,897.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.55 : 28,247.06 = 11,521.13 : x
  2. Step 2: Convert to fraction form
    20,470.55/28,247.06 = 11,521.13/x
  3. Step 3: Cross multiply
    20,470.55x = 28,247.06 × 11,521.13
  4. Step 4: Simplify right side
    20,470.55x = 325,437,937.95
  5. Step 5: Solve for x
    x = 325,437,937.95/20,470.55
  6. Step 6: Final answer
    x = 15,897.86

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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.