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Finding the Fourth Proportional to 8,613, 11,886.12 and 4,887

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Solution

The fourth proportional to 8,613, 11,886.12 and 4,887 is: 6,744.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613 : 11,886.12 = 4,887 : x
  2. Step 2: Convert to fraction form
    8,613/11,886.12 = 4,887/x
  3. Step 3: Cross multiply
    8,613x = 11,886.12 × 4,887
  4. Step 4: Simplify right side
    8,613x = 58,087,468.44
  5. Step 5: Solve for x
    x = 58,087,468.44/8,613
  6. Step 6: Final answer
    x = 6,744.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.