Home / 21,002.62-31,438.74-15,706.42

Finding the Fourth Proportional to 21,002.62, 31,438.74 and 15,706.42

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Solution

The fourth proportional to 21,002.62, 31,438.74 and 15,706.42 is: 23,510.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.62 : 31,438.74 = 15,706.42 : x
  2. Step 2: Convert to fraction form
    21,002.62/31,438.74 = 15,706.42/x
  3. Step 3: Cross multiply
    21,002.62x = 31,438.74 × 15,706.42
  4. Step 4: Simplify right side
    21,002.62x = 493,790,054.71
  5. Step 5: Solve for x
    x = 493,790,054.71/21,002.62
  6. Step 6: Final answer
    x = 23,510.88

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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.