Home / 28,255.48-39,000.18-17,638.72

Finding the Fourth Proportional to 28,255.48, 39,000.18 and 17,638.72

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Solution

The fourth proportional to 28,255.48, 39,000.18 and 17,638.72 is: 24,346.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,255.48 : 39,000.18 = 17,638.72 : x
  2. Step 2: Convert to fraction form
    28,255.48/39,000.18 = 17,638.72/x
  3. Step 3: Cross multiply
    28,255.48x = 39,000.18 × 17,638.72
  4. Step 4: Simplify right side
    28,255.48x = 687,913,254.97
  5. Step 5: Solve for x
    x = 687,913,254.97/28,255.48
  6. Step 6: Final answer
    x = 24,346.19

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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.