Home / 20,941.12-31,411.95-5,358.70

Finding the Fourth Proportional to 20,941.12, 31,411.95 and 5,358.70

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Solution

The fourth proportional to 20,941.12, 31,411.95 and 5,358.70 is: 8,038.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,941.12 : 31,411.95 = 5,358.70 : x
  2. Step 2: Convert to fraction form
    20,941.12/31,411.95 = 5,358.70/x
  3. Step 3: Cross multiply
    20,941.12x = 31,411.95 × 5,358.70
  4. Step 4: Simplify right side
    20,941.12x = 168,327,216.47
  5. Step 5: Solve for x
    x = 168,327,216.47/20,941.12
  6. Step 6: Final answer
    x = 8,038.12

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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.