Home / 7,890.16-11,838.75-4,191.49

Finding the Fourth Proportional to 7,890.16, 11,838.75 and 4,191.49

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Solution

The fourth proportional to 7,890.16, 11,838.75 and 4,191.49 is: 6,289.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.16 : 11,838.75 = 4,191.49 : x
  2. Step 2: Convert to fraction form
    7,890.16/11,838.75 = 4,191.49/x
  3. Step 3: Cross multiply
    7,890.16x = 11,838.75 × 4,191.49
  4. Step 4: Simplify right side
    7,890.16x = 49,622,002.24
  5. Step 5: Solve for x
    x = 49,622,002.24/7,890.16
  6. Step 6: Final answer
    x = 6,289.10

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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.