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Finding the Fourth Proportional to 8,480.90, 12,705.74 and 5,317.74

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Solution

The fourth proportional to 8,480.90, 12,705.74 and 5,317.74 is: 7,966.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,480.90 : 12,705.74 = 5,317.74 : x
  2. Step 2: Convert to fraction form
    8,480.90/12,705.74 = 5,317.74/x
  3. Step 3: Cross multiply
    8,480.90x = 12,705.74 × 5,317.74
  4. Step 4: Simplify right side
    8,480.90x = 67,565,821.83
  5. Step 5: Solve for x
    x = 67,565,821.83/8,480.90
  6. Step 6: Final answer
    x = 7,966.82

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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.