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Finding the Fourth Proportional to 8,603.29, 12,904.90 and 5,680.90

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Solution

The fourth proportional to 8,603.29, 12,904.90 and 5,680.90 is: 8,521.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,603.29 : 12,904.90 = 5,680.90 : x
  2. Step 2: Convert to fraction form
    8,603.29/12,904.90 = 5,680.90/x
  3. Step 3: Cross multiply
    8,603.29x = 12,904.90 × 5,680.90
  4. Step 4: Simplify right side
    8,603.29x = 73,311,446.41
  5. Step 5: Solve for x
    x = 73,311,446.41/8,603.29
  6. Step 6: Final answer
    x = 8,521.33

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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.