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Finding the Fourth Proportional to 18,703.25, 28,045.54 and 6,218.90

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Solution

The fourth proportional to 18,703.25, 28,045.54 and 6,218.90 is: 9,325.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.25 : 28,045.54 = 6,218.90 : x
  2. Step 2: Convert to fraction form
    18,703.25/28,045.54 = 6,218.90/x
  3. Step 3: Cross multiply
    18,703.25x = 28,045.54 × 6,218.90
  4. Step 4: Simplify right side
    18,703.25x = 174,412,460.30
  5. Step 5: Solve for x
    x = 174,412,460.30/18,703.25
  6. Step 6: Final answer
    x = 9,325.25

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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.