Home / 21,142.20-31,701.78-10,762.68

Finding the Fourth Proportional to 21,142.20, 31,701.78 and 10,762.68

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Solution

The fourth proportional to 21,142.20, 31,701.78 and 10,762.68 is: 16,138.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,142.20 : 31,701.78 = 10,762.68 : x
  2. Step 2: Convert to fraction form
    21,142.20/31,701.78 = 10,762.68/x
  3. Step 3: Cross multiply
    21,142.20x = 31,701.78 × 10,762.68
  4. Step 4: Simplify right side
    21,142.20x = 341,196,113.57
  5. Step 5: Solve for x
    x = 341,196,113.57/21,142.20
  6. Step 6: Final answer
    x = 16,138.16

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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.