Home / 28,288.85-39,016.08-18,218.12

Finding the Fourth Proportional to 28,288.85, 39,016.08 and 18,218.12

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Solution

The fourth proportional to 28,288.85, 39,016.08 and 18,218.12 is: 25,126.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,288.85 : 39,016.08 = 18,218.12 : x
  2. Step 2: Convert to fraction form
    28,288.85/39,016.08 = 18,218.12/x
  3. Step 3: Cross multiply
    28,288.85x = 39,016.08 × 18,218.12
  4. Step 4: Simplify right side
    28,288.85x = 710,799,432.29
  5. Step 5: Solve for x
    x = 710,799,432.29/28,288.85
  6. Step 6: Final answer
    x = 25,126.49

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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.