Home / 13,316.78-18,378.61-8,541.83

Finding the Fourth Proportional to 13,316.78, 18,378.61 and 8,541.83

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Solution

The fourth proportional to 13,316.78, 18,378.61 and 8,541.83 is: 11,788.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,316.78 : 18,378.61 = 8,541.83 : x
  2. Step 2: Convert to fraction form
    13,316.78/18,378.61 = 8,541.83/x
  3. Step 3: Cross multiply
    13,316.78x = 18,378.61 × 8,541.83
  4. Step 4: Simplify right side
    13,316.78x = 156,986,849.01
  5. Step 5: Solve for x
    x = 156,986,849.01/13,316.78
  6. Step 6: Final answer
    x = 11,788.65

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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.