Home / 31,315.20-46,972.80-10,553.28

Finding the Fourth Proportional to 31,315.20, 46,972.80 and 10,553.28

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Solution

The fourth proportional to 31,315.20, 46,972.80 and 10,553.28 is: 15,829.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,315.20 : 46,972.80 = 10,553.28 : x
  2. Step 2: Convert to fraction form
    31,315.20/46,972.80 = 10,553.28/x
  3. Step 3: Cross multiply
    31,315.20x = 46,972.80 × 10,553.28
  4. Step 4: Simplify right side
    31,315.20x = 495,717,110.78
  5. Step 5: Solve for x
    x = 495,717,110.78/31,315.20
  6. Step 6: Final answer
    x = 15,829.92

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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.