Home / 15,072.89-20,800.40-8,358.59

Finding the Fourth Proportional to 15,072.89, 20,800.40 and 8,358.59

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Solution

The fourth proportional to 15,072.89, 20,800.40 and 8,358.59 is: 11,534.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,072.89 : 20,800.40 = 8,358.59 : x
  2. Step 2: Convert to fraction form
    15,072.89/20,800.40 = 8,358.59/x
  3. Step 3: Cross multiply
    15,072.89x = 20,800.40 × 8,358.59
  4. Step 4: Simplify right side
    15,072.89x = 173,862,025.64
  5. Step 5: Solve for x
    x = 173,862,025.64/15,072.89
  6. Step 6: Final answer
    x = 11,534.75

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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.