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Finding the Fourth Proportional to 14,585.20, 21,877.80 and 13,721.20

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Solution

The fourth proportional to 14,585.20, 21,877.80 and 13,721.20 is: 20,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,585.20 : 21,877.80 = 13,721.20 : x
  2. Step 2: Convert to fraction form
    14,585.20/21,877.80 = 13,721.20/x
  3. Step 3: Cross multiply
    14,585.20x = 21,877.80 × 13,721.20
  4. Step 4: Simplify right side
    14,585.20x = 300,189,669.36
  5. Step 5: Solve for x
    x = 300,189,669.36/14,585.20
  6. Step 6: Final answer
    x = 20,581.80

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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.