Home / 14,864.40-20,520-11,877.12

Finding the Fourth Proportional to 14,864.40, 20,520 and 11,877.12

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Solution

The fourth proportional to 14,864.40, 20,520 and 11,877.12 is: 16,396.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,864.40 : 20,520 = 11,877.12 : x
  2. Step 2: Convert to fraction form
    14,864.40/20,520 = 11,877.12/x
  3. Step 3: Cross multiply
    14,864.40x = 20,520 × 11,877.12
  4. Step 4: Simplify right side
    14,864.40x = 243,718,502.40
  5. Step 5: Solve for x
    x = 243,718,502.40/14,864.40
  6. Step 6: Final answer
    x = 16,396.12

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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.