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Finding the Fourth Proportional to 65,618.88, 98,430.48 and 21,246

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Solution

The fourth proportional to 65,618.88, 98,430.48 and 21,246 is: 31,869.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,618.88 : 98,430.48 = 21,246 : x
  2. Step 2: Convert to fraction form
    65,618.88/98,430.48 = 21,246/x
  3. Step 3: Cross multiply
    65,618.88x = 98,430.48 × 21,246
  4. Step 4: Simplify right side
    65,618.88x = 2,091,253,978.08
  5. Step 5: Solve for x
    x = 2,091,253,978.08/65,618.88
  6. Step 6: Final answer
    x = 31,869.70

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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.