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Finding the Fourth Proportional to 12,658.32, 18,958.95 and 7,385.45

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Solution

The fourth proportional to 12,658.32, 18,958.95 and 7,385.45 is: 11,061.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,658.32 : 18,958.95 = 7,385.45 : x
  2. Step 2: Convert to fraction form
    12,658.32/18,958.95 = 7,385.45/x
  3. Step 3: Cross multiply
    12,658.32x = 18,958.95 × 7,385.45
  4. Step 4: Simplify right side
    12,658.32x = 140,020,282.48
  5. Step 5: Solve for x
    x = 140,020,282.48/12,658.32
  6. Step 6: Final answer
    x = 11,061.52

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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.