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Finding the Fourth Proportional to 19,937.20, 29,869.80 and 11,610.40

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Solution

The fourth proportional to 19,937.20, 29,869.80 and 11,610.40 is: 17,394.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,937.20 : 29,869.80 = 11,610.40 : x
  2. Step 2: Convert to fraction form
    19,937.20/29,869.80 = 11,610.40/x
  3. Step 3: Cross multiply
    19,937.20x = 29,869.80 × 11,610.40
  4. Step 4: Simplify right side
    19,937.20x = 346,800,325.92
  5. Step 5: Solve for x
    x = 346,800,325.92/19,937.20
  6. Step 6: Final answer
    x = 17,394.64

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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.