Home / 7,111.08-9,812.34-3,967.20

Finding the Fourth Proportional to 7,111.08, 9,812.34 and 3,967.20

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Solution

The fourth proportional to 7,111.08, 9,812.34 and 3,967.20 is: 5,474.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.08 : 9,812.34 = 3,967.20 : x
  2. Step 2: Convert to fraction form
    7,111.08/9,812.34 = 3,967.20/x
  3. Step 3: Cross multiply
    7,111.08x = 9,812.34 × 3,967.20
  4. Step 4: Simplify right side
    7,111.08x = 38,927,515.25
  5. Step 5: Solve for x
    x = 38,927,515.25/7,111.08
  6. Step 6: Final answer
    x = 5,474.21

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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.