Home / 20,281.47-27,988.36-11,328.99

Finding the Fourth Proportional to 20,281.47, 27,988.36 and 11,328.99

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Solution

The fourth proportional to 20,281.47, 27,988.36 and 11,328.99 is: 15,633.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.47 : 27,988.36 = 11,328.99 : x
  2. Step 2: Convert to fraction form
    20,281.47/27,988.36 = 11,328.99/x
  3. Step 3: Cross multiply
    20,281.47x = 27,988.36 × 11,328.99
  4. Step 4: Simplify right side
    20,281.47x = 317,079,850.56
  5. Step 5: Solve for x
    x = 317,079,850.56/20,281.47
  6. Step 6: Final answer
    x = 15,633.97

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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.