Home / 21,280.45-31,956.24-13,293.80

Finding the Fourth Proportional to 21,280.45, 31,956.24 and 13,293.80

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Solution

The fourth proportional to 21,280.45, 31,956.24 and 13,293.80 is: 19,962.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,280.45 : 31,956.24 = 13,293.80 : x
  2. Step 2: Convert to fraction form
    21,280.45/31,956.24 = 13,293.80/x
  3. Step 3: Cross multiply
    21,280.45x = 31,956.24 × 13,293.80
  4. Step 4: Simplify right side
    21,280.45x = 424,819,863.31
  5. Step 5: Solve for x
    x = 424,819,863.31/21,280.45
  6. Step 6: Final answer
    x = 19,962.92

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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.