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Finding the Fourth Proportional to 7,888.09, 11,781.84 and 7,136.45

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Solution

The fourth proportional to 7,888.09, 11,781.84 and 7,136.45 is: 10,659.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,888.09 : 11,781.84 = 7,136.45 : x
  2. Step 2: Convert to fraction form
    7,888.09/11,781.84 = 7,136.45/x
  3. Step 3: Cross multiply
    7,888.09x = 11,781.84 × 7,136.45
  4. Step 4: Simplify right side
    7,888.09x = 84,080,512.07
  5. Step 5: Solve for x
    x = 84,080,512.07/7,888.09
  6. Step 6: Final answer
    x = 10,659.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.