Home / 28,685.28-39,591.36-18,330.40

Finding the Fourth Proportional to 28,685.28, 39,591.36 and 18,330.40

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Solution

The fourth proportional to 28,685.28, 39,591.36 and 18,330.40 is: 25,299.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,685.28 : 39,591.36 = 18,330.40 : x
  2. Step 2: Convert to fraction form
    28,685.28/39,591.36 = 18,330.40/x
  3. Step 3: Cross multiply
    28,685.28x = 39,591.36 × 18,330.40
  4. Step 4: Simplify right side
    28,685.28x = 725,725,514.83
  5. Step 5: Solve for x
    x = 725,725,514.83/28,685.28
  6. Step 6: Final answer
    x = 25,299.58

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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.