Home / 28,180.64-42,242.16-18,339.68

Finding the Fourth Proportional to 28,180.64, 42,242.16 and 18,339.68

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Solution

The fourth proportional to 28,180.64, 42,242.16 and 18,339.68 is: 27,490.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,180.64 : 42,242.16 = 18,339.68 : x
  2. Step 2: Convert to fraction form
    28,180.64/42,242.16 = 18,339.68/x
  3. Step 3: Cross multiply
    28,180.64x = 42,242.16 × 18,339.68
  4. Step 4: Simplify right side
    28,180.64x = 774,707,696.91
  5. Step 5: Solve for x
    x = 774,707,696.91/28,180.64
  6. Step 6: Final answer
    x = 27,490.78

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1.5x scale

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.