Home / 28,007.40-38,649.78-15,432.60

Finding the Fourth Proportional to 28,007.40, 38,649.78 and 15,432.60

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Solution

The fourth proportional to 28,007.40, 38,649.78 and 15,432.60 is: 21,296.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,007.40 : 38,649.78 = 15,432.60 : x
  2. Step 2: Convert to fraction form
    28,007.40/38,649.78 = 15,432.60/x
  3. Step 3: Cross multiply
    28,007.40x = 38,649.78 × 15,432.60
  4. Step 4: Simplify right side
    28,007.40x = 596,466,594.83
  5. Step 5: Solve for x
    x = 596,466,594.83/28,007.40
  6. Step 6: Final answer
    x = 21,296.75

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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.