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Finding the Fourth Proportional to 8,699.78, 12,000.48 and 8,116.58

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Solution

The fourth proportional to 8,699.78, 12,000.48 and 8,116.58 is: 11,196.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,699.78 : 12,000.48 = 8,116.58 : x
  2. Step 2: Convert to fraction form
    8,699.78/12,000.48 = 8,116.58/x
  3. Step 3: Cross multiply
    8,699.78x = 12,000.48 × 8,116.58
  4. Step 4: Simplify right side
    8,699.78x = 97,402,855.96
  5. Step 5: Solve for x
    x = 97,402,855.96/8,699.78
  6. Step 6: Final answer
    x = 11,196.01

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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.