Home / 28,427.11-39,230.04-15,680.68

Finding the Fourth Proportional to 28,427.11, 39,230.04 and 15,680.68

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Solution

The fourth proportional to 28,427.11, 39,230.04 and 15,680.68 is: 21,639.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,427.11 : 39,230.04 = 15,680.68 : x
  2. Step 2: Convert to fraction form
    28,427.11/39,230.04 = 15,680.68/x
  3. Step 3: Cross multiply
    28,427.11x = 39,230.04 × 15,680.68
  4. Step 4: Simplify right side
    28,427.11x = 615,153,625.22
  5. Step 5: Solve for x
    x = 615,153,625.22/28,427.11
  6. Step 6: Final answer
    x = 21,639.68

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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.