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Finding the Fourth Proportional to 9,781.20, 14,671.80 and 6,670.80

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Solution

The fourth proportional to 9,781.20, 14,671.80 and 6,670.80 is: 10,006.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,781.20 : 14,671.80 = 6,670.80 : x
  2. Step 2: Convert to fraction form
    9,781.20/14,671.80 = 6,670.80/x
  3. Step 3: Cross multiply
    9,781.20x = 14,671.80 × 6,670.80
  4. Step 4: Simplify right side
    9,781.20x = 97,872,643.44
  5. Step 5: Solve for x
    x = 97,872,643.44/9,781.20
  6. Step 6: Final answer
    x = 10,006.20

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1.5x scale

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.