Home / 28,549.60-39,399.50-15,629.78

Finding the Fourth Proportional to 28,549.60, 39,399.50 and 15,629.78

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Solution

The fourth proportional to 28,549.60, 39,399.50 and 15,629.78 is: 21,569.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,549.60 : 39,399.50 = 15,629.78 : x
  2. Step 2: Convert to fraction form
    28,549.60/39,399.50 = 15,629.78/x
  3. Step 3: Cross multiply
    28,549.60x = 39,399.50 × 15,629.78
  4. Step 4: Simplify right side
    28,549.60x = 615,805,241.96
  5. Step 5: Solve for x
    x = 615,805,241.96/28,549.60
  6. Step 6: Final answer
    x = 21,569.67

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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.