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Finding the Fourth Proportional to 15,755.07, 21,742.02 and 8,681.67

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Solution

The fourth proportional to 15,755.07, 21,742.02 and 8,681.67 is: 11,980.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,755.07 : 21,742.02 = 8,681.67 : x
  2. Step 2: Convert to fraction form
    15,755.07/21,742.02 = 8,681.67/x
  3. Step 3: Cross multiply
    15,755.07x = 21,742.02 × 8,681.67
  4. Step 4: Simplify right side
    15,755.07x = 188,757,042.77
  5. Step 5: Solve for x
    x = 188,757,042.77/15,755.07
  6. Step 6: Final answer
    x = 11,980.72

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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.