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Finding the Fourth Proportional to 13,765.52, 18,995.64 and 7,798.66

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Solution

The fourth proportional to 13,765.52, 18,995.64 and 7,798.66 is: 10,761.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,765.52 : 18,995.64 = 7,798.66 : x
  2. Step 2: Convert to fraction form
    13,765.52/18,995.64 = 7,798.66/x
  3. Step 3: Cross multiply
    13,765.52x = 18,995.64 × 7,798.66
  4. Step 4: Simplify right side
    13,765.52x = 148,140,537.84
  5. Step 5: Solve for x
    x = 148,140,537.84/13,765.52
  6. Step 6: Final answer
    x = 10,761.71

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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.