Home / 8,680.84-11,980.11-5,143.30

Finding the Fourth Proportional to 8,680.84, 11,980.11 and 5,143.30

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Solution

The fourth proportional to 8,680.84, 11,980.11 and 5,143.30 is: 7,098.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.84 : 11,980.11 = 5,143.30 : x
  2. Step 2: Convert to fraction form
    8,680.84/11,980.11 = 5,143.30/x
  3. Step 3: Cross multiply
    8,680.84x = 11,980.11 × 5,143.30
  4. Step 4: Simplify right side
    8,680.84x = 61,617,299.76
  5. Step 5: Solve for x
    x = 61,617,299.76/8,680.84
  6. Step 6: Final answer
    x = 7,098.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.