Home / 31,247.52-43,123.72-20,618.68

Finding the Fourth Proportional to 31,247.52, 43,123.72 and 20,618.68

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Solution

The fourth proportional to 31,247.52, 43,123.72 and 20,618.68 is: 28,455.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,247.52 : 43,123.72 = 20,618.68 : x
  2. Step 2: Convert to fraction form
    31,247.52/43,123.72 = 20,618.68/x
  3. Step 3: Cross multiply
    31,247.52x = 43,123.72 × 20,618.68
  4. Step 4: Simplify right side
    31,247.52x = 889,154,183.09
  5. Step 5: Solve for x
    x = 889,154,183.09/31,247.52
  6. Step 6: Final answer
    x = 28,455.19

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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.