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Finding the Fourth Proportional to 14,751.61, 20,371.64 and 12,614.76

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Solution

The fourth proportional to 14,751.61, 20,371.64 and 12,614.76 is: 17,420.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,751.61 : 20,371.64 = 12,614.76 : x
  2. Step 2: Convert to fraction form
    14,751.61/20,371.64 = 12,614.76/x
  3. Step 3: Cross multiply
    14,751.61x = 20,371.64 × 12,614.76
  4. Step 4: Simplify right side
    14,751.61x = 256,983,349.41
  5. Step 5: Solve for x
    x = 256,983,349.41/14,751.61
  6. Step 6: Final answer
    x = 17,420.70

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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.