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Finding the Fourth Proportional to 28,272, 39,015.87 and 15,526.38

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Solution

The fourth proportional to 28,272, 39,015.87 and 15,526.38 is: 21,426.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,272 : 39,015.87 = 15,526.38 : x
  2. Step 2: Convert to fraction form
    28,272/39,015.87 = 15,526.38/x
  3. Step 3: Cross multiply
    28,272x = 39,015.87 × 15,526.38
  4. Step 4: Simplify right side
    28,272x = 605,775,223.65
  5. Step 5: Solve for x
    x = 605,775,223.65/28,272
  6. Step 6: Final answer
    x = 21,426.68

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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.