Home / 28,426.10-39,228.32-15,679.83

Finding the Fourth Proportional to 28,426.10, 39,228.32 and 15,679.83

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Solution

The fourth proportional to 28,426.10, 39,228.32 and 15,679.83 is: 21,638.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,426.10 : 39,228.32 = 15,679.83 : x
  2. Step 2: Convert to fraction form
    28,426.10/39,228.32 = 15,679.83/x
  3. Step 3: Cross multiply
    28,426.10x = 39,228.32 × 15,679.83
  4. Step 4: Simplify right side
    28,426.10x = 615,093,388.79
  5. Step 5: Solve for x
    x = 615,093,388.79/28,426.10
  6. Step 6: Final answer
    x = 21,638.33

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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.