Home / 15,217.52-20,989.05-10,172.87

Finding the Fourth Proportional to 15,217.52, 20,989.05 and 10,172.87

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Solution

The fourth proportional to 15,217.52, 20,989.05 and 10,172.87 is: 14,031.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,217.52 : 20,989.05 = 10,172.87 : x
  2. Step 2: Convert to fraction form
    15,217.52/20,989.05 = 10,172.87/x
  3. Step 3: Cross multiply
    15,217.52x = 20,989.05 × 10,172.87
  4. Step 4: Simplify right side
    15,217.52x = 213,518,877.07
  5. Step 5: Solve for x
    x = 213,518,877.07/15,217.52
  6. Step 6: Final answer
    x = 14,031.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.