Home / 11,989.81-16,550.15-7,901.93

Finding the Fourth Proportional to 11,989.81, 16,550.15 and 7,901.93

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Solution

The fourth proportional to 11,989.81, 16,550.15 and 7,901.93 is: 10,907.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,989.81 : 16,550.15 = 7,901.93 : x
  2. Step 2: Convert to fraction form
    11,989.81/16,550.15 = 7,901.93/x
  3. Step 3: Cross multiply
    11,989.81x = 16,550.15 × 7,901.93
  4. Step 4: Simplify right side
    11,989.81x = 130,778,087.28
  5. Step 5: Solve for x
    x = 130,778,087.28/11,989.81
  6. Step 6: Final answer
    x = 10,907.44

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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.