Home / 65,587.20-98,380.80-21,215.40

Finding the Fourth Proportional to 65,587.20, 98,380.80 and 21,215.40

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Solution

The fourth proportional to 65,587.20, 98,380.80 and 21,215.40 is: 31,823.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,587.20 : 98,380.80 = 21,215.40 : x
  2. Step 2: Convert to fraction form
    65,587.20/98,380.80 = 21,215.40/x
  3. Step 3: Cross multiply
    65,587.20x = 98,380.80 × 21,215.40
  4. Step 4: Simplify right side
    65,587.20x = 2,087,188,024.32
  5. Step 5: Solve for x
    x = 2,087,188,024.32/65,587.20
  6. Step 6: Final answer
    x = 31,823.10

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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.