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Finding the Fourth Proportional to 18,881.94, 28,323.45 and 6,402

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Solution

The fourth proportional to 18,881.94, 28,323.45 and 6,402 is: 9,603.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,881.94 : 28,323.45 = 6,402 : x
  2. Step 2: Convert to fraction form
    18,881.94/28,323.45 = 6,402/x
  3. Step 3: Cross multiply
    18,881.94x = 28,323.45 × 6,402
  4. Step 4: Simplify right side
    18,881.94x = 181,326,726.90
  5. Step 5: Solve for x
    x = 181,326,726.90/18,881.94
  6. Step 6: Final answer
    x = 9,603.18

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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.