Home / 51,385.20-77,081.40-21,799.68

Finding the Fourth Proportional to 51,385.20, 77,081.40 and 21,799.68

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Solution

The fourth proportional to 51,385.20, 77,081.40 and 21,799.68 is: 32,701.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,385.20 : 77,081.40 = 21,799.68 : x
  2. Step 2: Convert to fraction form
    51,385.20/77,081.40 = 21,799.68/x
  3. Step 3: Cross multiply
    51,385.20x = 77,081.40 × 21,799.68
  4. Step 4: Simplify right side
    51,385.20x = 1,680,349,853.95
  5. Step 5: Solve for x
    x = 1,680,349,853.95/51,385.20
  6. Step 6: Final answer
    x = 32,701.05

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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.