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Finding the Fourth Proportional to 10,699.60, 16,129.48 and 9,986.08

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Solution

The fourth proportional to 10,699.60, 16,129.48 and 9,986.08 is: 15,053.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,699.60 : 16,129.48 = 9,986.08 : x
  2. Step 2: Convert to fraction form
    10,699.60/16,129.48 = 9,986.08/x
  3. Step 3: Cross multiply
    10,699.60x = 16,129.48 × 9,986.08
  4. Step 4: Simplify right side
    10,699.60x = 161,070,277.64
  5. Step 5: Solve for x
    x = 161,070,277.64/10,699.60
  6. Step 6: Final answer
    x = 15,053.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.