Home / 13,587.53-18,753.03-7,620.66

Finding the Fourth Proportional to 13,587.53, 18,753.03 and 7,620.66

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Solution

The fourth proportional to 13,587.53, 18,753.03 and 7,620.66 is: 10,517.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,587.53 : 18,753.03 = 7,620.66 : x
  2. Step 2: Convert to fraction form
    13,587.53/18,753.03 = 7,620.66/x
  3. Step 3: Cross multiply
    13,587.53x = 18,753.03 × 7,620.66
  4. Step 4: Simplify right side
    13,587.53x = 142,910,465.60
  5. Step 5: Solve for x
    x = 142,910,465.60/13,587.53
  6. Step 6: Final answer
    x = 10,517.77

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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.