Home / 28,434.47-39,238.62-15,687.68

Finding the Fourth Proportional to 28,434.47, 39,238.62 and 15,687.68

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Solution

The fourth proportional to 28,434.47, 39,238.62 and 15,687.68 is: 21,648.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,434.47 : 39,238.62 = 15,687.68 : x
  2. Step 2: Convert to fraction form
    28,434.47/39,238.62 = 15,687.68/x
  3. Step 3: Cross multiply
    28,434.47x = 39,238.62 × 15,687.68
  4. Step 4: Simplify right side
    28,434.47x = 615,562,914.20
  5. Step 5: Solve for x
    x = 615,562,914.20/28,434.47
  6. Step 6: Final answer
    x = 21,648.48

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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.