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Finding the Fourth Proportional to 10,695.25, 16,019.51 and 5,421.20

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Solution

The fourth proportional to 10,695.25, 16,019.51 and 5,421.20 is: 8,119.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,695.25 : 16,019.51 = 5,421.20 : x
  2. Step 2: Convert to fraction form
    10,695.25/16,019.51 = 5,421.20/x
  3. Step 3: Cross multiply
    10,695.25x = 16,019.51 × 5,421.20
  4. Step 4: Simplify right side
    10,695.25x = 86,844,967.61
  5. Step 5: Solve for x
    x = 86,844,967.61/10,695.25
  6. Step 6: Final answer
    x = 8,119.96

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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.