Home / 28,101.78-42,117.60-18,079.86

Finding the Fourth Proportional to 28,101.78, 42,117.60 and 18,079.86

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Solution

The fourth proportional to 28,101.78, 42,117.60 and 18,079.86 is: 27,097.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,101.78 : 42,117.60 = 18,079.86 : x
  2. Step 2: Convert to fraction form
    28,101.78/42,117.60 = 18,079.86/x
  3. Step 3: Cross multiply
    28,101.78x = 42,117.60 × 18,079.86
  4. Step 4: Simplify right side
    28,101.78x = 761,480,311.54
  5. Step 5: Solve for x
    x = 761,480,311.54/28,101.78
  6. Step 6: Final answer
    x = 27,097.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.