Home / 12,306.47-18,458.15-3,985.74

Finding the Fourth Proportional to 12,306.47, 18,458.15 and 3,985.74

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Solution

The fourth proportional to 12,306.47, 18,458.15 and 3,985.74 is: 5,978.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,306.47 : 18,458.15 = 3,985.74 : x
  2. Step 2: Convert to fraction form
    12,306.47/18,458.15 = 3,985.74/x
  3. Step 3: Cross multiply
    12,306.47x = 18,458.15 × 3,985.74
  4. Step 4: Simplify right side
    12,306.47x = 73,569,366.85
  5. Step 5: Solve for x
    x = 73,569,366.85/12,306.47
  6. Step 6: Final answer
    x = 5,978.11

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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.