Home / 10,956.78-15,119.55-6,240.90

Finding the Fourth Proportional to 10,956.78, 15,119.55 and 6,240.90

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Solution

The fourth proportional to 10,956.78, 15,119.55 and 6,240.90 is: 8,611.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,956.78 : 15,119.55 = 6,240.90 : x
  2. Step 2: Convert to fraction form
    10,956.78/15,119.55 = 6,240.90/x
  3. Step 3: Cross multiply
    10,956.78x = 15,119.55 × 6,240.90
  4. Step 4: Simplify right side
    10,956.78x = 94,359,599.60
  5. Step 5: Solve for x
    x = 94,359,599.60/10,956.78
  6. Step 6: Final answer
    x = 8,611.98

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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.