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Finding the Fourth Proportional to 21,398.13, 32,102.70 and 8,914.02

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Solution

The fourth proportional to 21,398.13, 32,102.70 and 8,914.02 is: 13,373.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,398.13 : 32,102.70 = 8,914.02 : x
  2. Step 2: Convert to fraction form
    21,398.13/32,102.70 = 8,914.02/x
  3. Step 3: Cross multiply
    21,398.13x = 32,102.70 × 8,914.02
  4. Step 4: Simplify right side
    21,398.13x = 286,164,109.85
  5. Step 5: Solve for x
    x = 286,164,109.85/21,398.13
  6. Step 6: Final answer
    x = 13,373.32

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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.