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Finding the Fourth Proportional to 9,138.83, 13,630.28 and 8,980.88

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Solution

The fourth proportional to 9,138.83, 13,630.28 and 8,980.88 is: 13,394.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.83 : 13,630.28 = 8,980.88 : x
  2. Step 2: Convert to fraction form
    9,138.83/13,630.28 = 8,980.88/x
  3. Step 3: Cross multiply
    9,138.83x = 13,630.28 × 8,980.88
  4. Step 4: Simplify right side
    9,138.83x = 122,411,795.99
  5. Step 5: Solve for x
    x = 122,411,795.99/9,138.83
  6. Step 6: Final answer
    x = 13,394.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.