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Finding the Fourth Proportional to 9,611.70, 14,417.55 and 7,991.70

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Solution

The fourth proportional to 9,611.70, 14,417.55 and 7,991.70 is: 11,987.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,611.70 : 14,417.55 = 7,991.70 : x
  2. Step 2: Convert to fraction form
    9,611.70/14,417.55 = 7,991.70/x
  3. Step 3: Cross multiply
    9,611.70x = 14,417.55 × 7,991.70
  4. Step 4: Simplify right side
    9,611.70x = 115,220,734.34
  5. Step 5: Solve for x
    x = 115,220,734.34/9,611.70
  6. Step 6: Final answer
    x = 11,987.55

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Similar ratio
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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.