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Finding the Fourth Proportional to 11,891.70, 17,837.55 and 9,818.10

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Solution

The fourth proportional to 11,891.70, 17,837.55 and 9,818.10 is: 14,727.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,891.70 : 17,837.55 = 9,818.10 : x
  2. Step 2: Convert to fraction form
    11,891.70/17,837.55 = 9,818.10/x
  3. Step 3: Cross multiply
    11,891.70x = 17,837.55 × 9,818.10
  4. Step 4: Simplify right side
    11,891.70x = 175,130,849.66
  5. Step 5: Solve for x
    x = 175,130,849.66/11,891.70
  6. Step 6: Final answer
    x = 14,727.15

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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.