Home / 28,979.60-39,987.24-16,230.80

Finding the Fourth Proportional to 28,979.60, 39,987.24 and 16,230.80

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Solution

The fourth proportional to 28,979.60, 39,987.24 and 16,230.80 is: 22,395.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,979.60 : 39,987.24 = 16,230.80 : x
  2. Step 2: Convert to fraction form
    28,979.60/39,987.24 = 16,230.80/x
  3. Step 3: Cross multiply
    28,979.60x = 39,987.24 × 16,230.80
  4. Step 4: Simplify right side
    28,979.60x = 649,024,894.99
  5. Step 5: Solve for x
    x = 649,024,894.99/28,979.60
  6. Step 6: Final answer
    x = 22,395.92

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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.