Home / 21,320.10-31,904.55-18,576.90

Finding the Fourth Proportional to 21,320.10, 31,904.55 and 18,576.90

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Solution

The fourth proportional to 21,320.10, 31,904.55 and 18,576.90 is: 27,799.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.10 : 31,904.55 = 18,576.90 : x
  2. Step 2: Convert to fraction form
    21,320.10/31,904.55 = 18,576.90/x
  3. Step 3: Cross multiply
    21,320.10x = 31,904.55 × 18,576.90
  4. Step 4: Simplify right side
    21,320.10x = 592,687,634.90
  5. Step 5: Solve for x
    x = 592,687,634.90/21,320.10
  6. Step 6: Final answer
    x = 27,799.48

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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.