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Finding the Fourth Proportional to 13,953.20, 20,929.80 and 10,672.70

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Solution

The fourth proportional to 13,953.20, 20,929.80 and 10,672.70 is: 16,009.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,953.20 : 20,929.80 = 10,672.70 : x
  2. Step 2: Convert to fraction form
    13,953.20/20,929.80 = 10,672.70/x
  3. Step 3: Cross multiply
    13,953.20x = 20,929.80 × 10,672.70
  4. Step 4: Simplify right side
    13,953.20x = 223,377,476.46
  5. Step 5: Solve for x
    x = 223,377,476.46/13,953.20
  6. Step 6: Final answer
    x = 16,009.05

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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.