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Finding the Fourth Proportional to 15,868.67, 21,899.04 and 8,698.11

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Solution

The fourth proportional to 15,868.67, 21,899.04 and 8,698.11 is: 12,003.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,868.67 : 21,899.04 = 8,698.11 : x
  2. Step 2: Convert to fraction form
    15,868.67/21,899.04 = 8,698.11/x
  3. Step 3: Cross multiply
    15,868.67x = 21,899.04 × 8,698.11
  4. Step 4: Simplify right side
    15,868.67x = 190,480,127.57
  5. Step 5: Solve for x
    x = 190,480,127.57/15,868.67
  6. Step 6: Final answer
    x = 12,003.53

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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.