Home / 31,392.09-43,332.45-20,785.14

Finding the Fourth Proportional to 31,392.09, 43,332.45 and 20,785.14

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Solution

The fourth proportional to 31,392.09, 43,332.45 and 20,785.14 is: 28,691.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,392.09 : 43,332.45 = 20,785.14 : x
  2. Step 2: Convert to fraction form
    31,392.09/43,332.45 = 20,785.14/x
  3. Step 3: Cross multiply
    31,392.09x = 43,332.45 × 20,785.14
  4. Step 4: Simplify right side
    31,392.09x = 900,670,823.13
  5. Step 5: Solve for x
    x = 900,670,823.13/31,392.09
  6. Step 6: Final answer
    x = 28,691.02

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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.