Home / 19,917.78-27,468.81-15,718.74

Finding the Fourth Proportional to 19,917.78, 27,468.81 and 15,718.74

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Solution

The fourth proportional to 19,917.78, 27,468.81 and 15,718.74 is: 21,677.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,917.78 : 27,468.81 = 15,718.74 : x
  2. Step 2: Convert to fraction form
    19,917.78/27,468.81 = 15,718.74/x
  3. Step 3: Cross multiply
    19,917.78x = 27,468.81 × 15,718.74
  4. Step 4: Simplify right side
    19,917.78x = 431,775,082.50
  5. Step 5: Solve for x
    x = 431,775,082.50/19,917.78
  6. Step 6: Final answer
    x = 21,677.87

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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.