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Finding the Fourth Proportional to 10,659.70, 15,988.11 and 2,868.98

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Solution

The fourth proportional to 10,659.70, 15,988.11 and 2,868.98 is: 4,303.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,659.70 : 15,988.11 = 2,868.98 : x
  2. Step 2: Convert to fraction form
    10,659.70/15,988.11 = 2,868.98/x
  3. Step 3: Cross multiply
    10,659.70x = 15,988.11 × 2,868.98
  4. Step 4: Simplify right side
    10,659.70x = 45,869,567.83
  5. Step 5: Solve for x
    x = 45,869,567.83/10,659.70
  6. Step 6: Final answer
    x = 4,303.08

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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.