Home / 12,478.20-18,717.26-8,570.76

Finding the Fourth Proportional to 12,478.20, 18,717.26 and 8,570.76

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Solution

The fourth proportional to 12,478.20, 18,717.26 and 8,570.76 is: 12,856.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.20 : 18,717.26 = 8,570.76 : x
  2. Step 2: Convert to fraction form
    12,478.20/18,717.26 = 8,570.76/x
  3. Step 3: Cross multiply
    12,478.20x = 18,717.26 × 8,570.76
  4. Step 4: Simplify right side
    12,478.20x = 160,421,143.32
  5. Step 5: Solve for x
    x = 160,421,143.32/12,478.20
  6. Step 6: Final answer
    x = 12,856.11

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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.