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Finding the Fourth Proportional to 8,418.78, 12,628.17 and 4,715.46

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Solution

The fourth proportional to 8,418.78, 12,628.17 and 4,715.46 is: 7,073.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,418.78 : 12,628.17 = 4,715.46 : x
  2. Step 2: Convert to fraction form
    8,418.78/12,628.17 = 4,715.46/x
  3. Step 3: Cross multiply
    8,418.78x = 12,628.17 × 4,715.46
  4. Step 4: Simplify right side
    8,418.78x = 59,547,630.51
  5. Step 5: Solve for x
    x = 59,547,630.51/8,418.78
  6. Step 6: Final answer
    x = 7,073.19

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Similar ratio
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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.