Home / 15,108.79-20,844.31-11,139.34

Finding the Fourth Proportional to 15,108.79, 20,844.31 and 11,139.34

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Solution

The fourth proportional to 15,108.79, 20,844.31 and 11,139.34 is: 15,367.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,108.79 : 20,844.31 = 11,139.34 : x
  2. Step 2: Convert to fraction form
    15,108.79/20,844.31 = 11,139.34/x
  3. Step 3: Cross multiply
    15,108.79x = 20,844.31 × 11,139.34
  4. Step 4: Simplify right side
    15,108.79x = 232,191,696.24
  5. Step 5: Solve for x
    x = 232,191,696.24/15,108.79
  6. Step 6: Final answer
    x = 15,367.99

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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.