Home / 28,448.20-42,672.30-18,105.80

Finding the Fourth Proportional to 28,448.20, 42,672.30 and 18,105.80

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Solution

The fourth proportional to 28,448.20, 42,672.30 and 18,105.80 is: 27,158.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,448.20 : 42,672.30 = 18,105.80 : x
  2. Step 2: Convert to fraction form
    28,448.20/42,672.30 = 18,105.80/x
  3. Step 3: Cross multiply
    28,448.20x = 42,672.30 × 18,105.80
  4. Step 4: Simplify right side
    28,448.20x = 772,616,129.34
  5. Step 5: Solve for x
    x = 772,616,129.34/28,448.20
  6. Step 6: Final answer
    x = 27,158.70

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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.