Home / 28,251.81-38,986.17-15,504.69

Finding the Fourth Proportional to 28,251.81, 38,986.17 and 15,504.69

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Solution

The fourth proportional to 28,251.81, 38,986.17 and 15,504.69 is: 21,395.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,251.81 : 38,986.17 = 15,504.69 : x
  2. Step 2: Convert to fraction form
    28,251.81/38,986.17 = 15,504.69/x
  3. Step 3: Cross multiply
    28,251.81x = 38,986.17 × 15,504.69
  4. Step 4: Simplify right side
    28,251.81x = 604,468,480.14
  5. Step 5: Solve for x
    x = 604,468,480.14/28,251.81
  6. Step 6: Final answer
    x = 21,395.74

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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.