Home / 8,312.79-12,471.60-3,119.07

Finding the Fourth Proportional to 8,312.79, 12,471.60 and 3,119.07

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Solution

The fourth proportional to 8,312.79, 12,471.60 and 3,119.07 is: 4,679.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,312.79 : 12,471.60 = 3,119.07 : x
  2. Step 2: Convert to fraction form
    8,312.79/12,471.60 = 3,119.07/x
  3. Step 3: Cross multiply
    8,312.79x = 12,471.60 × 3,119.07
  4. Step 4: Simplify right side
    8,312.79x = 38,899,793.41
  5. Step 5: Solve for x
    x = 38,899,793.41/8,312.79
  6. Step 6: Final answer
    x = 4,679.51

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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.