Home / 28,149.86-38,852.16-20,105.30

Finding the Fourth Proportional to 28,149.86, 38,852.16 and 20,105.30

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Solution

The fourth proportional to 28,149.86, 38,852.16 and 20,105.30 is: 27,749.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,149.86 : 38,852.16 = 20,105.30 : x
  2. Step 2: Convert to fraction form
    28,149.86/38,852.16 = 20,105.30/x
  3. Step 3: Cross multiply
    28,149.86x = 38,852.16 × 20,105.30
  4. Step 4: Simplify right side
    28,149.86x = 781,134,332.45
  5. Step 5: Solve for x
    x = 781,134,332.45/28,149.86
  6. Step 6: Final answer
    x = 27,749.14

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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.