Home / 21,285.72-31,948.25-10,763.15

Finding the Fourth Proportional to 21,285.72, 31,948.25 and 10,763.15

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Solution

The fourth proportional to 21,285.72, 31,948.25 and 10,763.15 is: 16,154.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.72 : 31,948.25 = 10,763.15 : x
  2. Step 2: Convert to fraction form
    21,285.72/31,948.25 = 10,763.15/x
  3. Step 3: Cross multiply
    21,285.72x = 31,948.25 × 10,763.15
  4. Step 4: Simplify right side
    21,285.72x = 343,863,593.43
  5. Step 5: Solve for x
    x = 343,863,593.43/21,285.72
  6. Step 6: Final answer
    x = 16,154.66

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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.