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Finding the Fourth Proportional to 15,898.75, 21,942.30 and 9,611.13

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Solution

The fourth proportional to 15,898.75, 21,942.30 and 9,611.13 is: 13,264.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,898.75 : 21,942.30 = 9,611.13 : x
  2. Step 2: Convert to fraction form
    15,898.75/21,942.30 = 9,611.13/x
  3. Step 3: Cross multiply
    15,898.75x = 21,942.30 × 9,611.13
  4. Step 4: Simplify right side
    15,898.75x = 210,890,297.80
  5. Step 5: Solve for x
    x = 210,890,297.80/15,898.75
  6. Step 6: Final answer
    x = 13,264.58

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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.