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Finding the Fourth Proportional to 19,242.36, 28,864.26 and 5,391

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Solution

The fourth proportional to 19,242.36, 28,864.26 and 5,391 is: 8,086.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,242.36 : 28,864.26 = 5,391 : x
  2. Step 2: Convert to fraction form
    19,242.36/28,864.26 = 5,391/x
  3. Step 3: Cross multiply
    19,242.36x = 28,864.26 × 5,391
  4. Step 4: Simplify right side
    19,242.36x = 155,607,225.66
  5. Step 5: Solve for x
    x = 155,607,225.66/19,242.36
  6. Step 6: Final answer
    x = 8,086.70

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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.