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Finding the Fourth Proportional to 26,929.80, 40,394.70 and 13,807.80

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Solution

The fourth proportional to 26,929.80, 40,394.70 and 13,807.80 is: 20,711.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,929.80 : 40,394.70 = 13,807.80 : x
  2. Step 2: Convert to fraction form
    26,929.80/40,394.70 = 13,807.80/x
  3. Step 3: Cross multiply
    26,929.80x = 40,394.70 × 13,807.80
  4. Step 4: Simplify right side
    26,929.80x = 557,761,938.66
  5. Step 5: Solve for x
    x = 557,761,938.66/26,929.80
  6. Step 6: Final answer
    x = 20,711.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.