Home / 10,989.20-15,164.35-6,143.61

Finding the Fourth Proportional to 10,989.20, 15,164.35 and 6,143.61

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Solution

The fourth proportional to 10,989.20, 15,164.35 and 6,143.61 is: 8,477.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,989.20 : 15,164.35 = 6,143.61 : x
  2. Step 2: Convert to fraction form
    10,989.20/15,164.35 = 6,143.61/x
  3. Step 3: Cross multiply
    10,989.20x = 15,164.35 × 6,143.61
  4. Step 4: Simplify right side
    10,989.20x = 93,163,893.81
  5. Step 5: Solve for x
    x = 93,163,893.81/10,989.20
  6. Step 6: Final answer
    x = 8,477.77

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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.