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Finding the Fourth Proportional to 18,699.54, 28,053.63 and 6,218.64

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Solution

The fourth proportional to 18,699.54, 28,053.63 and 6,218.64 is: 9,329.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.54 : 28,053.63 = 6,218.64 : x
  2. Step 2: Convert to fraction form
    18,699.54/28,053.63 = 6,218.64/x
  3. Step 3: Cross multiply
    18,699.54x = 28,053.63 × 6,218.64
  4. Step 4: Simplify right side
    18,699.54x = 174,455,425.66
  5. Step 5: Solve for x
    x = 174,455,425.66/18,699.54
  6. Step 6: Final answer
    x = 9,329.40

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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.