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Finding the Fourth Proportional to 7,187.86, 9,919.03 and 4,001.00

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Solution

The fourth proportional to 7,187.86, 9,919.03 and 4,001.00 is: 5,521.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187.86 : 9,919.03 = 4,001.00 : x
  2. Step 2: Convert to fraction form
    7,187.86/9,919.03 = 4,001.00/x
  3. Step 3: Cross multiply
    7,187.86x = 9,919.03 × 4,001.00
  4. Step 4: Simplify right side
    7,187.86x = 39,685,998.19
  5. Step 5: Solve for x
    x = 39,685,998.19/7,187.86
  6. Step 6: Final answer
    x = 5,521.25

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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.