Home / 21,275.78-31,899.96-10,182.20

Finding the Fourth Proportional to 21,275.78, 31,899.96 and 10,182.20

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Solution

The fourth proportional to 21,275.78, 31,899.96 and 10,182.20 is: 15,266.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,275.78 : 31,899.96 = 10,182.20 : x
  2. Step 2: Convert to fraction form
    21,275.78/31,899.96 = 10,182.20/x
  3. Step 3: Cross multiply
    21,275.78x = 31,899.96 × 10,182.20
  4. Step 4: Simplify right side
    21,275.78x = 324,811,613.21
  5. Step 5: Solve for x
    x = 324,811,613.21/21,275.78
  6. Step 6: Final answer
    x = 15,266.73

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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.