Home / 28,163.84-38,865.96-15,588.56

Finding the Fourth Proportional to 28,163.84, 38,865.96 and 15,588.56

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Solution

The fourth proportional to 28,163.84, 38,865.96 and 15,588.56 is: 21,512.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,163.84 : 38,865.96 = 15,588.56 : x
  2. Step 2: Convert to fraction form
    28,163.84/38,865.96 = 15,588.56/x
  3. Step 3: Cross multiply
    28,163.84x = 38,865.96 × 15,588.56
  4. Step 4: Simplify right side
    28,163.84x = 605,864,349.42
  5. Step 5: Solve for x
    x = 605,864,349.42/28,163.84
  6. Step 6: Final answer
    x = 21,512.14

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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.