Home / 13,621.67-18,808.40-10,980.87

Finding the Fourth Proportional to 13,621.67, 18,808.40 and 10,980.87

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Solution

The fourth proportional to 13,621.67, 18,808.40 and 10,980.87 is: 15,162.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.67 : 18,808.40 = 10,980.87 : x
  2. Step 2: Convert to fraction form
    13,621.67/18,808.40 = 10,980.87/x
  3. Step 3: Cross multiply
    13,621.67x = 18,808.40 × 10,980.87
  4. Step 4: Simplify right side
    13,621.67x = 206,532,595.31
  5. Step 5: Solve for x
    x = 206,532,595.31/13,621.67
  6. Step 6: Final answer
    x = 15,162.06

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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.