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Finding the Fourth Proportional to 19,658.40, 29,545.20 and 19,312.80

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Solution

The fourth proportional to 19,658.40, 29,545.20 and 19,312.80 is: 29,025.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,658.40 : 29,545.20 = 19,312.80 : x
  2. Step 2: Convert to fraction form
    19,658.40/29,545.20 = 19,312.80/x
  3. Step 3: Cross multiply
    19,658.40x = 29,545.20 × 19,312.80
  4. Step 4: Simplify right side
    19,658.40x = 570,600,538.56
  5. Step 5: Solve for x
    x = 570,600,538.56/19,658.40
  6. Step 6: Final answer
    x = 29,025.79

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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.