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Finding the Fourth Proportional to 12,699.96, 19,062.70 and 10,387.42

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Solution

The fourth proportional to 12,699.96, 19,062.70 and 10,387.42 is: 15,591.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,699.96 : 19,062.70 = 10,387.42 : x
  2. Step 2: Convert to fraction form
    12,699.96/19,062.70 = 10,387.42/x
  3. Step 3: Cross multiply
    12,699.96x = 19,062.70 × 10,387.42
  4. Step 4: Simplify right side
    12,699.96x = 198,012,271.23
  5. Step 5: Solve for x
    x = 198,012,271.23/12,699.96
  6. Step 6: Final answer
    x = 15,591.57

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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.