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Finding the Fourth Proportional to 13,354.40, 20,002.80 and 11,895.20

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Solution

The fourth proportional to 13,354.40, 20,002.80 and 11,895.20 is: 17,817.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,354.40 : 20,002.80 = 11,895.20 : x
  2. Step 2: Convert to fraction form
    13,354.40/20,002.80 = 11,895.20/x
  3. Step 3: Cross multiply
    13,354.40x = 20,002.80 × 11,895.20
  4. Step 4: Simplify right side
    13,354.40x = 237,937,306.56
  5. Step 5: Solve for x
    x = 237,937,306.56/13,354.40
  6. Step 6: Final answer
    x = 17,817.15

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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.