Home / 25,979.64-35,871.09-15,921.81

Finding the Fourth Proportional to 25,979.64, 35,871.09 and 15,921.81

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Solution

The fourth proportional to 25,979.64, 35,871.09 and 15,921.81 is: 21,983.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,979.64 : 35,871.09 = 15,921.81 : x
  2. Step 2: Convert to fraction form
    25,979.64/35,871.09 = 15,921.81/x
  3. Step 3: Cross multiply
    25,979.64x = 35,871.09 × 15,921.81
  4. Step 4: Simplify right side
    25,979.64x = 571,132,679.47
  5. Step 5: Solve for x
    x = 571,132,679.47/25,979.64
  6. Step 6: Final answer
    x = 21,983.86

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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.