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Finding the Fourth Proportional to 12,572.96, 18,859.47 and 3,807.95

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Solution

The fourth proportional to 12,572.96, 18,859.47 and 3,807.95 is: 5,711.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,572.96 : 18,859.47 = 3,807.95 : x
  2. Step 2: Convert to fraction form
    12,572.96/18,859.47 = 3,807.95/x
  3. Step 3: Cross multiply
    12,572.96x = 18,859.47 × 3,807.95
  4. Step 4: Simplify right side
    12,572.96x = 71,815,810.21
  5. Step 5: Solve for x
    x = 71,815,810.21/12,572.96
  6. Step 6: Final answer
    x = 5,711.93

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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.