Home / 28,427.94-39,230.60-15,680.84

Finding the Fourth Proportional to 28,427.94, 39,230.60 and 15,680.84

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Solution

The fourth proportional to 28,427.94, 39,230.60 and 15,680.84 is: 21,639.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,427.94 : 39,230.60 = 15,680.84 : x
  2. Step 2: Convert to fraction form
    28,427.94/39,230.60 = 15,680.84/x
  3. Step 3: Cross multiply
    28,427.94x = 39,230.60 × 15,680.84
  4. Step 4: Simplify right side
    28,427.94x = 615,168,487.15
  5. Step 5: Solve for x
    x = 615,168,487.15/28,427.94
  6. Step 6: Final answer
    x = 21,639.57

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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.