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Finding the Fourth Proportional to 18,887.04, 28,326.78 and 5,739.12

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Solution

The fourth proportional to 18,887.04, 28,326.78 and 5,739.12 is: 8,607.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,887.04 : 28,326.78 = 5,739.12 : x
  2. Step 2: Convert to fraction form
    18,887.04/28,326.78 = 5,739.12/x
  3. Step 3: Cross multiply
    18,887.04x = 28,326.78 × 5,739.12
  4. Step 4: Simplify right side
    18,887.04x = 162,570,789.63
  5. Step 5: Solve for x
    x = 162,570,789.63/18,887.04
  6. Step 6: Final answer
    x = 8,607.53

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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.