Home / 12,298.80-18,438.78-5,720.19

Finding the Fourth Proportional to 12,298.80, 18,438.78 and 5,720.19

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Solution

The fourth proportional to 12,298.80, 18,438.78 and 5,720.19 is: 8,575.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,298.80 : 18,438.78 = 5,720.19 : x
  2. Step 2: Convert to fraction form
    12,298.80/18,438.78 = 5,720.19/x
  3. Step 3: Cross multiply
    12,298.80x = 18,438.78 × 5,720.19
  4. Step 4: Simplify right side
    12,298.80x = 105,473,324.97
  5. Step 5: Solve for x
    x = 105,473,324.97/12,298.80
  6. Step 6: Final answer
    x = 8,575.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.