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Finding the Fourth Proportional to 19,700.67, 27,186.10 and 11,201.61

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Solution

The fourth proportional to 19,700.67, 27,186.10 and 11,201.61 is: 15,457.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,700.67 : 27,186.10 = 11,201.61 : x
  2. Step 2: Convert to fraction form
    19,700.67/27,186.10 = 11,201.61/x
  3. Step 3: Cross multiply
    19,700.67x = 27,186.10 × 11,201.61
  4. Step 4: Simplify right side
    19,700.67x = 304,528,010.64
  5. Step 5: Solve for x
    x = 304,528,010.64/19,700.67
  6. Step 6: Final answer
    x = 15,457.75

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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.