Home / 10,121.63-15,178.80-4,278.70

Finding the Fourth Proportional to 10,121.63, 15,178.80 and 4,278.70

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Solution

The fourth proportional to 10,121.63, 15,178.80 and 4,278.70 is: 6,416.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,121.63 : 15,178.80 = 4,278.70 : x
  2. Step 2: Convert to fraction form
    10,121.63/15,178.80 = 4,278.70/x
  3. Step 3: Cross multiply
    10,121.63x = 15,178.80 × 4,278.70
  4. Step 4: Simplify right side
    10,121.63x = 64,945,493.61
  5. Step 5: Solve for x
    x = 64,945,493.61/10,121.63
  6. Step 6: Final answer
    x = 6,416.50

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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.