Home / 28,139.81-38,816.01-18,579.78

Finding the Fourth Proportional to 28,139.81, 38,816.01 and 18,579.78

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Solution

The fourth proportional to 28,139.81, 38,816.01 and 18,579.78 is: 25,628.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.81 : 38,816.01 = 18,579.78 : x
  2. Step 2: Convert to fraction form
    28,139.81/38,816.01 = 18,579.78/x
  3. Step 3: Cross multiply
    28,139.81x = 38,816.01 × 18,579.78
  4. Step 4: Simplify right side
    28,139.81x = 721,192,926.28
  5. Step 5: Solve for x
    x = 721,192,926.28/28,139.81
  6. Step 6: Final answer
    x = 25,628.92

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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.