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Finding the Fourth Proportional to 65,370.64, 98,046.68 and 20,991.64

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Solution

The fourth proportional to 65,370.64, 98,046.68 and 20,991.64 is: 31,484.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,370.64 : 98,046.68 = 20,991.64 : x
  2. Step 2: Convert to fraction form
    65,370.64/98,046.68 = 20,991.64/x
  3. Step 3: Cross multiply
    65,370.64x = 98,046.68 × 20,991.64
  4. Step 4: Simplify right side
    65,370.64x = 2,058,160,609.76
  5. Step 5: Solve for x
    x = 2,058,160,609.76/65,370.64
  6. Step 6: Final answer
    x = 31,484.48

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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.