Home / 31,337.47-43,230.56-20,578.14

Finding the Fourth Proportional to 31,337.47, 43,230.56 and 20,578.14

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Solution

The fourth proportional to 31,337.47, 43,230.56 and 20,578.14 is: 28,387.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,337.47 : 43,230.56 = 20,578.14 : x
  2. Step 2: Convert to fraction form
    31,337.47/43,230.56 = 20,578.14/x
  3. Step 3: Cross multiply
    31,337.47x = 43,230.56 × 20,578.14
  4. Step 4: Simplify right side
    31,337.47x = 889,604,413.07
  5. Step 5: Solve for x
    x = 889,604,413.07/31,337.47
  6. Step 6: Final answer
    x = 28,387.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.