Home / 27,830.06-38,385.14-20,278.70

Finding the Fourth Proportional to 27,830.06, 38,385.14 and 20,278.70

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Solution

The fourth proportional to 27,830.06, 38,385.14 and 20,278.70 is: 27,969.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,830.06 : 38,385.14 = 20,278.70 : x
  2. Step 2: Convert to fraction form
    27,830.06/38,385.14 = 20,278.70/x
  3. Step 3: Cross multiply
    27,830.06x = 38,385.14 × 20,278.70
  4. Step 4: Simplify right side
    27,830.06x = 778,400,738.52
  5. Step 5: Solve for x
    x = 778,400,738.52/27,830.06
  6. Step 6: Final answer
    x = 27,969.78

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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.