Home / 13,666.80-18,853.20-9,191.04

Finding the Fourth Proportional to 13,666.80, 18,853.20 and 9,191.04

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Solution

The fourth proportional to 13,666.80, 18,853.20 and 9,191.04 is: 12,678.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,666.80 : 18,853.20 = 9,191.04 : x
  2. Step 2: Convert to fraction form
    13,666.80/18,853.20 = 9,191.04/x
  3. Step 3: Cross multiply
    13,666.80x = 18,853.20 × 9,191.04
  4. Step 4: Simplify right side
    13,666.80x = 173,280,515.33
  5. Step 5: Solve for x
    x = 173,280,515.33/13,666.80
  6. Step 6: Final answer
    x = 12,678.94

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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.