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Finding the Fourth Proportional to 13,925.40, 20,891.76 and 6,905.13

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Solution

The fourth proportional to 13,925.40, 20,891.76 and 6,905.13 is: 10,359.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,925.40 : 20,891.76 = 6,905.13 : x
  2. Step 2: Convert to fraction form
    13,925.40/20,891.76 = 6,905.13/x
  3. Step 3: Cross multiply
    13,925.40x = 20,891.76 × 6,905.13
  4. Step 4: Simplify right side
    13,925.40x = 144,260,318.73
  5. Step 5: Solve for x
    x = 144,260,318.73/13,925.40
  6. Step 6: Final answer
    x = 10,359.51

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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.