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Finding the Fourth Proportional to 8,603.10, 12,904.65 and 5,147.10

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Solution

The fourth proportional to 8,603.10, 12,904.65 and 5,147.10 is: 7,720.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,603.10 : 12,904.65 = 5,147.10 : x
  2. Step 2: Convert to fraction form
    8,603.10/12,904.65 = 5,147.10/x
  3. Step 3: Cross multiply
    8,603.10x = 12,904.65 × 5,147.10
  4. Step 4: Simplify right side
    8,603.10x = 66,421,524.02
  5. Step 5: Solve for x
    x = 66,421,524.02/8,603.10
  6. Step 6: Final answer
    x = 7,720.65

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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.