Home / 31,420.78-47,154.32-17,392.70

Finding the Fourth Proportional to 31,420.78, 47,154.32 and 17,392.70

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Solution

The fourth proportional to 31,420.78, 47,154.32 and 17,392.70 is: 26,101.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,420.78 : 47,154.32 = 17,392.70 : x
  2. Step 2: Convert to fraction form
    31,420.78/47,154.32 = 17,392.70/x
  3. Step 3: Cross multiply
    31,420.78x = 47,154.32 × 17,392.70
  4. Step 4: Simplify right side
    31,420.78x = 820,140,941.46
  5. Step 5: Solve for x
    x = 820,140,941.46/31,420.78
  6. Step 6: Final answer
    x = 26,101.86

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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.