Home / 20,386.41-28,133.13-11,311.68

Finding the Fourth Proportional to 20,386.41, 28,133.13 and 11,311.68

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Solution

The fourth proportional to 20,386.41, 28,133.13 and 11,311.68 is: 15,610.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.41 : 28,133.13 = 11,311.68 : x
  2. Step 2: Convert to fraction form
    20,386.41/28,133.13 = 11,311.68/x
  3. Step 3: Cross multiply
    20,386.41x = 28,133.13 × 11,311.68
  4. Step 4: Simplify right side
    20,386.41x = 318,232,963.96
  5. Step 5: Solve for x
    x = 318,232,963.96/20,386.41
  6. Step 6: Final answer
    x = 15,610.05

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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.