Home / 28,007.78-38,649.21-15,431.54

Finding the Fourth Proportional to 28,007.78, 38,649.21 and 15,431.54

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Solution

The fourth proportional to 28,007.78, 38,649.21 and 15,431.54 is: 21,294.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,007.78 : 38,649.21 = 15,431.54 : x
  2. Step 2: Convert to fraction form
    28,007.78/38,649.21 = 15,431.54/x
  3. Step 3: Cross multiply
    28,007.78x = 38,649.21 × 15,431.54
  4. Step 4: Simplify right side
    28,007.78x = 596,416,830.08
  5. Step 5: Solve for x
    x = 596,416,830.08/28,007.78
  6. Step 6: Final answer
    x = 21,294.68

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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.