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Finding the Fourth Proportional to 13,952.18, 20,931.92 and 8,103.18

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Solution

The fourth proportional to 13,952.18, 20,931.92 and 8,103.18 is: 12,156.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,952.18 : 20,931.92 = 8,103.18 : x
  2. Step 2: Convert to fraction form
    13,952.18/20,931.92 = 8,103.18/x
  3. Step 3: Cross multiply
    13,952.18x = 20,931.92 × 8,103.18
  4. Step 4: Simplify right side
    13,952.18x = 169,615,115.51
  5. Step 5: Solve for x
    x = 169,615,115.51/13,952.18
  6. Step 6: Final answer
    x = 12,156.89

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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.