Home / 13,620.57-18,803.39-9,421.53

Finding the Fourth Proportional to 13,620.57, 18,803.39 and 9,421.53

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Solution

The fourth proportional to 13,620.57, 18,803.39 and 9,421.53 is: 13,006.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.57 : 18,803.39 = 9,421.53 : x
  2. Step 2: Convert to fraction form
    13,620.57/18,803.39 = 9,421.53/x
  3. Step 3: Cross multiply
    13,620.57x = 18,803.39 × 9,421.53
  4. Step 4: Simplify right side
    13,620.57x = 177,156,655.88
  5. Step 5: Solve for x
    x = 177,156,655.88/13,620.57
  6. Step 6: Final answer
    x = 13,006.55

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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.