Home / 13,511.15-18,645.08-7,543.38

Finding the Fourth Proportional to 13,511.15, 18,645.08 and 7,543.38

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Solution

The fourth proportional to 13,511.15, 18,645.08 and 7,543.38 is: 10,409.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,511.15 : 18,645.08 = 7,543.38 : x
  2. Step 2: Convert to fraction form
    13,511.15/18,645.08 = 7,543.38/x
  3. Step 3: Cross multiply
    13,511.15x = 18,645.08 × 7,543.38
  4. Step 4: Simplify right side
    13,511.15x = 140,646,844.22
  5. Step 5: Solve for x
    x = 140,646,844.22/13,511.15
  6. Step 6: Final answer
    x = 10,409.69

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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.