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Finding the Fourth Proportional to 18,907.66, 28,365.72 and 5,761.06

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Solution

The fourth proportional to 18,907.66, 28,365.72 and 5,761.06 is: 8,642.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.66 : 28,365.72 = 5,761.06 : x
  2. Step 2: Convert to fraction form
    18,907.66/28,365.72 = 5,761.06/x
  3. Step 3: Cross multiply
    18,907.66x = 28,365.72 × 5,761.06
  4. Step 4: Simplify right side
    18,907.66x = 163,416,614.86
  5. Step 5: Solve for x
    x = 163,416,614.86/18,907.66
  6. Step 6: Final answer
    x = 8,642.88

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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.