Home / 20,088.78-27,719.60-11,136.28

Finding the Fourth Proportional to 20,088.78, 27,719.60 and 11,136.28

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Solution

The fourth proportional to 20,088.78, 27,719.60 and 11,136.28 is: 15,366.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,088.78 : 27,719.60 = 11,136.28 : x
  2. Step 2: Convert to fraction form
    20,088.78/27,719.60 = 11,136.28/x
  3. Step 3: Cross multiply
    20,088.78x = 27,719.60 × 11,136.28
  4. Step 4: Simplify right side
    20,088.78x = 308,693,227.09
  5. Step 5: Solve for x
    x = 308,693,227.09/20,088.78
  6. Step 6: Final answer
    x = 15,366.45

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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.