Home / 28,314.72-39,076.24-15,739.44

Finding the Fourth Proportional to 28,314.72, 39,076.24 and 15,739.44

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Solution

The fourth proportional to 28,314.72, 39,076.24 and 15,739.44 is: 21,721.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,314.72 : 39,076.24 = 15,739.44 : x
  2. Step 2: Convert to fraction form
    28,314.72/39,076.24 = 15,739.44/x
  3. Step 3: Cross multiply
    28,314.72x = 39,076.24 × 15,739.44
  4. Step 4: Simplify right side
    28,314.72x = 615,038,134.91
  5. Step 5: Solve for x
    x = 615,038,134.91/28,314.72
  6. Step 6: Final answer
    x = 21,721.50

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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.