Home / 8,478.45-12,719.70-4,319.10

Finding the Fourth Proportional to 8,478.45, 12,719.70 and 4,319.10

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Solution

The fourth proportional to 8,478.45, 12,719.70 and 4,319.10 is: 6,479.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.45 : 12,719.70 = 4,319.10 : x
  2. Step 2: Convert to fraction form
    8,478.45/12,719.70 = 4,319.10/x
  3. Step 3: Cross multiply
    8,478.45x = 12,719.70 × 4,319.10
  4. Step 4: Simplify right side
    8,478.45x = 54,937,656.27
  5. Step 5: Solve for x
    x = 54,937,656.27/8,478.45
  6. Step 6: Final answer
    x = 6,479.68

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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.