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Finding the Fourth Proportional to 27,959.58, 38,586.78 and 15,385.14

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Solution

The fourth proportional to 27,959.58, 38,586.78 and 15,385.14 is: 21,232.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,959.58 : 38,586.78 = 15,385.14 : x
  2. Step 2: Convert to fraction form
    27,959.58/38,586.78 = 15,385.14/x
  3. Step 3: Cross multiply
    27,959.58x = 38,586.78 × 15,385.14
  4. Step 4: Simplify right side
    27,959.58x = 593,663,012.45
  5. Step 5: Solve for x
    x = 593,663,012.45/27,959.58
  6. Step 6: Final answer
    x = 21,232.90

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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.