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Finding the Fourth Proportional to 18,671.90, 28,010.48 and 6,984

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Solution

The fourth proportional to 18,671.90, 28,010.48 and 6,984 is: 10,476.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.90 : 28,010.48 = 6,984 : x
  2. Step 2: Convert to fraction form
    18,671.90/28,010.48 = 6,984/x
  3. Step 3: Cross multiply
    18,671.90x = 28,010.48 × 6,984
  4. Step 4: Simplify right side
    18,671.90x = 195,625,157.40
  5. Step 5: Solve for x
    x = 195,625,157.40/18,671.90
  6. Step 6: Final answer
    x = 10,476.98

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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.