Home / 28,985.20-39,983.64-17,042.80

Finding the Fourth Proportional to 28,985.20, 39,983.64 and 17,042.80

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Solution

The fourth proportional to 28,985.20, 39,983.64 and 17,042.80 is: 23,509.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,985.20 : 39,983.64 = 17,042.80 : x
  2. Step 2: Convert to fraction form
    28,985.20/39,983.64 = 17,042.80/x
  3. Step 3: Cross multiply
    28,985.20x = 39,983.64 × 17,042.80
  4. Step 4: Simplify right side
    28,985.20x = 681,433,179.79
  5. Step 5: Solve for x
    x = 681,433,179.79/28,985.20
  6. Step 6: Final answer
    x = 23,509.69

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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.