Home / 28,479.35-42,710.95-11,818.78

Finding the Fourth Proportional to 28,479.35, 42,710.95 and 11,818.78

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Solution

The fourth proportional to 28,479.35, 42,710.95 and 11,818.78 is: 17,724.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,479.35 : 42,710.95 = 11,818.78 : x
  2. Step 2: Convert to fraction form
    28,479.35/42,710.95 = 11,818.78/x
  3. Step 3: Cross multiply
    28,479.35x = 42,710.95 × 11,818.78
  4. Step 4: Simplify right side
    28,479.35x = 504,791,321.64
  5. Step 5: Solve for x
    x = 504,791,321.64/28,479.35
  6. Step 6: Final answer
    x = 17,724.82

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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.