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Finding the Fourth Proportional to 22,987.90, 34,485.90 and 8,205.40

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Solution

The fourth proportional to 22,987.90, 34,485.90 and 8,205.40 is: 12,309.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,987.90 : 34,485.90 = 8,205.40 : x
  2. Step 2: Convert to fraction form
    22,987.90/34,485.90 = 8,205.40/x
  3. Step 3: Cross multiply
    22,987.90x = 34,485.90 × 8,205.40
  4. Step 4: Simplify right side
    22,987.90x = 282,970,603.86
  5. Step 5: Solve for x
    x = 282,970,603.86/22,987.90
  6. Step 6: Final answer
    x = 12,309.55

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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.