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Finding the Fourth Proportional to 8,478.71, 12,719.26 and 3,547.23

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Solution

The fourth proportional to 8,478.71, 12,719.26 and 3,547.23 is: 5,321.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.71 : 12,719.26 = 3,547.23 : x
  2. Step 2: Convert to fraction form
    8,478.71/12,719.26 = 3,547.23/x
  3. Step 3: Cross multiply
    8,478.71x = 12,719.26 × 3,547.23
  4. Step 4: Simplify right side
    8,478.71x = 45,118,097.39
  5. Step 5: Solve for x
    x = 45,118,097.39/8,478.71
  6. Step 6: Final answer
    x = 5,321.34

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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.