Home / 20,155.79-27,815.10-11,204.13

Finding the Fourth Proportional to 20,155.79, 27,815.10 and 11,204.13

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Solution

The fourth proportional to 20,155.79, 27,815.10 and 11,204.13 is: 15,461.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.79 : 27,815.10 = 11,204.13 : x
  2. Step 2: Convert to fraction form
    20,155.79/27,815.10 = 11,204.13/x
  3. Step 3: Cross multiply
    20,155.79x = 27,815.10 × 11,204.13
  4. Step 4: Simplify right side
    20,155.79x = 311,643,996.36
  5. Step 5: Solve for x
    x = 311,643,996.36/20,155.79
  6. Step 6: Final answer
    x = 15,461.76

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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.