Home / 13,685.61-20,566.89-8,139.96

Finding the Fourth Proportional to 13,685.61, 20,566.89 and 8,139.96

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Solution

The fourth proportional to 13,685.61, 20,566.89 and 8,139.96 is: 12,232.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.61 : 20,566.89 = 8,139.96 : x
  2. Step 2: Convert to fraction form
    13,685.61/20,566.89 = 8,139.96/x
  3. Step 3: Cross multiply
    13,685.61x = 20,566.89 × 8,139.96
  4. Step 4: Simplify right side
    13,685.61x = 167,413,661.92
  5. Step 5: Solve for x
    x = 167,413,661.92/13,685.61
  6. Step 6: Final answer
    x = 12,232.82

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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.