Home / 28,154.28-38,853.18-15,579

Finding the Fourth Proportional to 28,154.28, 38,853.18 and 15,579

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Solution

The fourth proportional to 28,154.28, 38,853.18 and 15,579 is: 21,499.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,154.28 : 38,853.18 = 15,579 : x
  2. Step 2: Convert to fraction form
    28,154.28/38,853.18 = 15,579/x
  3. Step 3: Cross multiply
    28,154.28x = 38,853.18 × 15,579
  4. Step 4: Simplify right side
    28,154.28x = 605,293,691.22
  5. Step 5: Solve for x
    x = 605,293,691.22/28,154.28
  6. Step 6: Final answer
    x = 21,499.17

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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.