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Finding the Fourth Proportional to 14,701.76, 20,289.12 and 8,655.20

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Solution

The fourth proportional to 14,701.76, 20,289.12 and 8,655.20 is: 11,944.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,701.76 : 20,289.12 = 8,655.20 : x
  2. Step 2: Convert to fraction form
    14,701.76/20,289.12 = 8,655.20/x
  3. Step 3: Cross multiply
    14,701.76x = 20,289.12 × 8,655.20
  4. Step 4: Simplify right side
    14,701.76x = 175,606,391.42
  5. Step 5: Solve for x
    x = 175,606,391.42/14,701.76
  6. Step 6: Final answer
    x = 11,944.58

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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.