Home / 28,435.74-39,241.72-15,689.48

Finding the Fourth Proportional to 28,435.74, 39,241.72 and 15,689.48

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Solution

The fourth proportional to 28,435.74, 39,241.72 and 15,689.48 is: 21,651.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,435.74 : 39,241.72 = 15,689.48 : x
  2. Step 2: Convert to fraction form
    28,435.74/39,241.72 = 15,689.48/x
  3. Step 3: Cross multiply
    28,435.74x = 39,241.72 × 15,689.48
  4. Step 4: Simplify right side
    28,435.74x = 615,682,004.51
  5. Step 5: Solve for x
    x = 615,682,004.51/28,435.74
  6. Step 6: Final answer
    x = 21,651.70

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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.