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Finding the Fourth Proportional to 20,312.25, 28,034.15 and 11,927.13

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Solution

The fourth proportional to 20,312.25, 28,034.15 and 11,927.13 is: 16,461.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,312.25 : 28,034.15 = 11,927.13 : x
  2. Step 2: Convert to fraction form
    20,312.25/28,034.15 = 11,927.13/x
  3. Step 3: Cross multiply
    20,312.25x = 28,034.15 × 11,927.13
  4. Step 4: Simplify right side
    20,312.25x = 334,366,891.85
  5. Step 5: Solve for x
    x = 334,366,891.85/20,312.25
  6. Step 6: Final answer
    x = 16,461.34

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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.