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Finding the Fourth Proportional to 14,952.20, 20,648.12 and 12,815.42

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Solution

The fourth proportional to 14,952.20, 20,648.12 and 12,815.42 is: 17,697.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,952.20 : 20,648.12 = 12,815.42 : x
  2. Step 2: Convert to fraction form
    14,952.20/20,648.12 = 12,815.42/x
  3. Step 3: Cross multiply
    14,952.20x = 20,648.12 × 12,815.42
  4. Step 4: Simplify right side
    14,952.20x = 264,614,162.69
  5. Step 5: Solve for x
    x = 264,614,162.69/14,952.20
  6. Step 6: Final answer
    x = 17,697.35

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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.