Home / 28,312.80-39,060.76-18,240.44

Finding the Fourth Proportional to 28,312.80, 39,060.76 and 18,240.44

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Solution

The fourth proportional to 28,312.80, 39,060.76 and 18,240.44 is: 25,164.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,312.80 : 39,060.76 = 18,240.44 : x
  2. Step 2: Convert to fraction form
    28,312.80/39,060.76 = 18,240.44/x
  3. Step 3: Cross multiply
    28,312.80x = 39,060.76 × 18,240.44
  4. Step 4: Simplify right side
    28,312.80x = 712,485,449.13
  5. Step 5: Solve for x
    x = 712,485,449.13/28,312.80
  6. Step 6: Final answer
    x = 25,164.78

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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.