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Finding the Fourth Proportional to 8,603.13, 12,903.09 and 2,980.77

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Solution

The fourth proportional to 8,603.13, 12,903.09 and 2,980.77 is: 4,470.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,603.13 : 12,903.09 = 2,980.77 : x
  2. Step 2: Convert to fraction form
    8,603.13/12,903.09 = 2,980.77/x
  3. Step 3: Cross multiply
    8,603.13x = 12,903.09 × 2,980.77
  4. Step 4: Simplify right side
    8,603.13x = 38,461,143.58
  5. Step 5: Solve for x
    x = 38,461,143.58/8,603.13
  6. Step 6: Final answer
    x = 4,470.60

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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.