Home / 7,901.12-11,851.47-3,221.11

Finding the Fourth Proportional to 7,901.12, 11,851.47 and 3,221.11

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Solution

The fourth proportional to 7,901.12, 11,851.47 and 3,221.11 is: 4,831.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,901.12 : 11,851.47 = 3,221.11 : x
  2. Step 2: Convert to fraction form
    7,901.12/11,851.47 = 3,221.11/x
  3. Step 3: Cross multiply
    7,901.12x = 11,851.47 × 3,221.11
  4. Step 4: Simplify right side
    7,901.12x = 38,174,829.27
  5. Step 5: Solve for x
    x = 38,174,829.27/7,901.12
  6. Step 6: Final answer
    x = 4,831.57

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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.