Home / 31,849.89-47,780.57-13,119.70

Finding the Fourth Proportional to 31,849.89, 47,780.57 and 13,119.70

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Solution

The fourth proportional to 31,849.89, 47,780.57 and 13,119.70 is: 19,681.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,849.89 : 47,780.57 = 13,119.70 : x
  2. Step 2: Convert to fraction form
    31,849.89/47,780.57 = 13,119.70/x
  3. Step 3: Cross multiply
    31,849.89x = 47,780.57 × 13,119.70
  4. Step 4: Simplify right side
    31,849.89x = 626,866,744.23
  5. Step 5: Solve for x
    x = 626,866,744.23/31,849.89
  6. Step 6: Final answer
    x = 19,681.91

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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.