Home / 28,119.47-38,789.80-18,549.89

Finding the Fourth Proportional to 28,119.47, 38,789.80 and 18,549.89

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Solution

The fourth proportional to 28,119.47, 38,789.80 and 18,549.89 is: 25,588.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,119.47 : 38,789.80 = 18,549.89 : x
  2. Step 2: Convert to fraction form
    28,119.47/38,789.80 = 18,549.89/x
  3. Step 3: Cross multiply
    28,119.47x = 38,789.80 × 18,549.89
  4. Step 4: Simplify right side
    28,119.47x = 719,546,523.12
  5. Step 5: Solve for x
    x = 719,546,523.12/28,119.47
  6. Step 6: Final answer
    x = 25,588.91

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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.