Home / 31,296.60-43,201.08-20,700.72

Finding the Fourth Proportional to 31,296.60, 43,201.08 and 20,700.72

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Solution

The fourth proportional to 31,296.60, 43,201.08 and 20,700.72 is: 28,574.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,296.60 : 43,201.08 = 20,700.72 : x
  2. Step 2: Convert to fraction form
    31,296.60/43,201.08 = 20,700.72/x
  3. Step 3: Cross multiply
    31,296.60x = 43,201.08 × 20,700.72
  4. Step 4: Simplify right side
    31,296.60x = 894,293,460.78
  5. Step 5: Solve for x
    x = 894,293,460.78/31,296.60
  6. Step 6: Final answer
    x = 28,574.78

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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.