Home / 13,379.61-19,988.04-8,661.18

Finding the Fourth Proportional to 13,379.61, 19,988.04 and 8,661.18

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Solution

The fourth proportional to 13,379.61, 19,988.04 and 8,661.18 is: 12,939.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,379.61 : 19,988.04 = 8,661.18 : x
  2. Step 2: Convert to fraction form
    13,379.61/19,988.04 = 8,661.18/x
  3. Step 3: Cross multiply
    13,379.61x = 19,988.04 × 8,661.18
  4. Step 4: Simplify right side
    13,379.61x = 173,120,012.29
  5. Step 5: Solve for x
    x = 173,120,012.29/13,379.61
  6. Step 6: Final answer
    x = 12,939.09

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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.