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Finding the Fourth Proportional to 8,613.12, 12,916.86 and 3,347.76

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Solution

The fourth proportional to 8,613.12, 12,916.86 and 3,347.76 is: 5,020.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.12 : 12,916.86 = 3,347.76 : x
  2. Step 2: Convert to fraction form
    8,613.12/12,916.86 = 3,347.76/x
  3. Step 3: Cross multiply
    8,613.12x = 12,916.86 × 3,347.76
  4. Step 4: Simplify right side
    8,613.12x = 43,242,547.23
  5. Step 5: Solve for x
    x = 43,242,547.23/8,613.12
  6. Step 6: Final answer
    x = 5,020.54

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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.