Home / 28,100.64-38,778.42-15,353.55

Finding the Fourth Proportional to 28,100.64, 38,778.42 and 15,353.55

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Solution

The fourth proportional to 28,100.64, 38,778.42 and 15,353.55 is: 21,187.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,100.64 : 38,778.42 = 15,353.55 : x
  2. Step 2: Convert to fraction form
    28,100.64/38,778.42 = 15,353.55/x
  3. Step 3: Cross multiply
    28,100.64x = 38,778.42 × 15,353.55
  4. Step 4: Simplify right side
    28,100.64x = 595,386,322.55
  5. Step 5: Solve for x
    x = 595,386,322.55/28,100.64
  6. Step 6: Final answer
    x = 21,187.65

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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.