Home / 10,521.45-15,781.55-3,947.08

Finding the Fourth Proportional to 10,521.45, 15,781.55 and 3,947.08

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Solution

The fourth proportional to 10,521.45, 15,781.55 and 3,947.08 is: 5,920.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.45 : 15,781.55 = 3,947.08 : x
  2. Step 2: Convert to fraction form
    10,521.45/15,781.55 = 3,947.08/x
  3. Step 3: Cross multiply
    10,521.45x = 15,781.55 × 3,947.08
  4. Step 4: Simplify right side
    10,521.45x = 62,291,089.70
  5. Step 5: Solve for x
    x = 62,291,089.70/10,521.45
  6. Step 6: Final answer
    x = 5,920.39

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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.