Home / 21,066.28-31,604.90-10,535.87

Finding the Fourth Proportional to 21,066.28, 31,604.90 and 10,535.87

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Solution

The fourth proportional to 21,066.28, 31,604.90 and 10,535.87 is: 15,806.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,066.28 : 31,604.90 = 10,535.87 : x
  2. Step 2: Convert to fraction form
    21,066.28/31,604.90 = 10,535.87/x
  3. Step 3: Cross multiply
    21,066.28x = 31,604.90 × 10,535.87
  4. Step 4: Simplify right side
    21,066.28x = 332,985,144.10
  5. Step 5: Solve for x
    x = 332,985,144.10/21,066.28
  6. Step 6: Final answer
    x = 15,806.55

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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.