Home / 21,288.18-31,899.45-13,480.59

Finding the Fourth Proportional to 21,288.18, 31,899.45 and 13,480.59

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Solution

The fourth proportional to 21,288.18, 31,899.45 and 13,480.59 is: 20,200.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.18 : 31,899.45 = 13,480.59 : x
  2. Step 2: Convert to fraction form
    21,288.18/31,899.45 = 13,480.59/x
  3. Step 3: Cross multiply
    21,288.18x = 31,899.45 × 13,480.59
  4. Step 4: Simplify right side
    21,288.18x = 430,023,576.85
  5. Step 5: Solve for x
    x = 430,023,576.85/21,288.18
  6. Step 6: Final answer
    x = 20,200.11

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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.