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Finding the Fourth Proportional to 65,657.70, 98,486.55 and 21,285.90

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Solution

The fourth proportional to 65,657.70, 98,486.55 and 21,285.90 is: 31,928.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,657.70 : 98,486.55 = 21,285.90 : x
  2. Step 2: Convert to fraction form
    65,657.70/98,486.55 = 21,285.90/x
  3. Step 3: Cross multiply
    65,657.70x = 98,486.55 × 21,285.90
  4. Step 4: Simplify right side
    65,657.70x = 2,096,374,854.65
  5. Step 5: Solve for x
    x = 2,096,374,854.65/65,657.70
  6. Step 6: Final answer
    x = 31,928.85

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1.5x scale

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.