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Finding the Fourth Proportional to 8,954.88, 12,357.80 and 5,178.04

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Solution

The fourth proportional to 8,954.88, 12,357.80 and 5,178.04 is: 7,145.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,954.88 : 12,357.80 = 5,178.04 : x
  2. Step 2: Convert to fraction form
    8,954.88/12,357.80 = 5,178.04/x
  3. Step 3: Cross multiply
    8,954.88x = 12,357.80 × 5,178.04
  4. Step 4: Simplify right side
    8,954.88x = 63,989,182.71
  5. Step 5: Solve for x
    x = 63,989,182.71/8,954.88
  6. Step 6: Final answer
    x = 7,145.73

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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.