Home / 13,578.39-18,725.05-9,543.91

Finding the Fourth Proportional to 13,578.39, 18,725.05 and 9,543.91

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Solution

The fourth proportional to 13,578.39, 18,725.05 and 9,543.91 is: 13,161.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,578.39 : 18,725.05 = 9,543.91 : x
  2. Step 2: Convert to fraction form
    13,578.39/18,725.05 = 9,543.91/x
  3. Step 3: Cross multiply
    13,578.39x = 18,725.05 × 9,543.91
  4. Step 4: Simplify right side
    13,578.39x = 178,710,191.95
  5. Step 5: Solve for x
    x = 178,710,191.95/13,578.39
  6. Step 6: Final answer
    x = 13,161.37

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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.