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Finding the Fourth Proportional to 21,396.84, 32,087.12 and 8,570.08

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Solution

The fourth proportional to 21,396.84, 32,087.12 and 8,570.08 is: 12,851.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,396.84 : 32,087.12 = 8,570.08 : x
  2. Step 2: Convert to fraction form
    21,396.84/32,087.12 = 8,570.08/x
  3. Step 3: Cross multiply
    21,396.84x = 32,087.12 × 8,570.08
  4. Step 4: Simplify right side
    21,396.84x = 274,989,185.37
  5. Step 5: Solve for x
    x = 274,989,185.37/21,396.84
  6. Step 6: Final answer
    x = 12,851.86

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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.