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Finding the Fourth Proportional to 15,847.47, 21,868.92 and 8,774.01

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Solution

The fourth proportional to 15,847.47, 21,868.92 and 8,774.01 is: 12,107.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,847.47 : 21,868.92 = 8,774.01 : x
  2. Step 2: Convert to fraction form
    15,847.47/21,868.92 = 8,774.01/x
  3. Step 3: Cross multiply
    15,847.47x = 21,868.92 × 8,774.01
  4. Step 4: Simplify right side
    15,847.47x = 191,878,122.77
  5. Step 5: Solve for x
    x = 191,878,122.77/15,847.47
  6. Step 6: Final answer
    x = 12,107.81

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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.