Home / 28,365.28-39,143.76-15,618.20

Finding the Fourth Proportional to 28,365.28, 39,143.76 and 15,618.20

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Solution

The fourth proportional to 28,365.28, 39,143.76 and 15,618.20 is: 21,552.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,365.28 : 39,143.76 = 15,618.20 : x
  2. Step 2: Convert to fraction form
    28,365.28/39,143.76 = 15,618.20/x
  3. Step 3: Cross multiply
    28,365.28x = 39,143.76 × 15,618.20
  4. Step 4: Simplify right side
    28,365.28x = 611,355,072.43
  5. Step 5: Solve for x
    x = 611,355,072.43/28,365.28
  6. Step 6: Final answer
    x = 21,552.93

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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.