Home / 28,659.80-39,545.15-16,720.16

Finding the Fourth Proportional to 28,659.80, 39,545.15 and 16,720.16

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Solution

The fourth proportional to 28,659.80, 39,545.15 and 16,720.16 is: 23,070.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,659.80 : 39,545.15 = 16,720.16 : x
  2. Step 2: Convert to fraction form
    28,659.80/39,545.15 = 16,720.16/x
  3. Step 3: Cross multiply
    28,659.80x = 39,545.15 × 16,720.16
  4. Step 4: Simplify right side
    28,659.80x = 661,200,953.90
  5. Step 5: Solve for x
    x = 661,200,953.90/28,659.80
  6. Step 6: Final answer
    x = 23,070.68

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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.