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Finding the Fourth Proportional to 9,873.90, 13,623.78 and 5,682.15

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Solution

The fourth proportional to 9,873.90, 13,623.78 and 5,682.15 is: 7,840.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,873.90 : 13,623.78 = 5,682.15 : x
  2. Step 2: Convert to fraction form
    9,873.90/13,623.78 = 5,682.15/x
  3. Step 3: Cross multiply
    9,873.90x = 13,623.78 × 5,682.15
  4. Step 4: Simplify right side
    9,873.90x = 77,412,361.53
  5. Step 5: Solve for x
    x = 77,412,361.53/9,873.90
  6. Step 6: Final answer
    x = 7,840.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.