Home / 45,186.40-67,780.28-11,909.85

Finding the Fourth Proportional to 45,186.40, 67,780.28 and 11,909.85

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Solution

The fourth proportional to 45,186.40, 67,780.28 and 11,909.85 is: 17,864.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,186.40 : 67,780.28 = 11,909.85 : x
  2. Step 2: Convert to fraction form
    45,186.40/67,780.28 = 11,909.85/x
  3. Step 3: Cross multiply
    45,186.40x = 67,780.28 × 11,909.85
  4. Step 4: Simplify right side
    45,186.40x = 807,252,967.76
  5. Step 5: Solve for x
    x = 807,252,967.76/45,186.40
  6. Step 6: Final answer
    x = 17,864.95

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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.