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Finding the Fourth Proportional to 19,898.40, 29,869.20 and 15,535.20

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Solution

The fourth proportional to 19,898.40, 29,869.20 and 15,535.20 is: 23,319.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,898.40 : 29,869.20 = 15,535.20 : x
  2. Step 2: Convert to fraction form
    19,898.40/29,869.20 = 15,535.20/x
  3. Step 3: Cross multiply
    19,898.40x = 29,869.20 × 15,535.20
  4. Step 4: Simplify right side
    19,898.40x = 464,023,995.84
  5. Step 5: Solve for x
    x = 464,023,995.84/19,898.40
  6. Step 6: Final answer
    x = 23,319.66

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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.