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Finding the Fourth Proportional to 19,278.93, 28,839.20 and 15,390.93

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Solution

The fourth proportional to 19,278.93, 28,839.20 and 15,390.93 is: 23,023.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,278.93 : 28,839.20 = 15,390.93 : x
  2. Step 2: Convert to fraction form
    19,278.93/28,839.20 = 15,390.93/x
  3. Step 3: Cross multiply
    19,278.93x = 28,839.20 × 15,390.93
  4. Step 4: Simplify right side
    19,278.93x = 443,862,031.50
  5. Step 5: Solve for x
    x = 443,862,031.50/19,278.93
  6. Step 6: Final answer
    x = 23,023.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.