Home / 12,572.12-18,859.10-3,807.72

Finding the Fourth Proportional to 12,572.12, 18,859.10 and 3,807.72

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Solution

The fourth proportional to 12,572.12, 18,859.10 and 3,807.72 is: 5,711.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,572.12 : 18,859.10 = 3,807.72 : x
  2. Step 2: Convert to fraction form
    12,572.12/18,859.10 = 3,807.72/x
  3. Step 3: Cross multiply
    12,572.12x = 18,859.10 × 3,807.72
  4. Step 4: Simplify right side
    12,572.12x = 71,810,153.21
  5. Step 5: Solve for x
    x = 71,810,153.21/12,572.12
  6. Step 6: Final answer
    x = 5,711.86

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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.