Home / 12,311.28-16,989.48-6,722.28

Finding the Fourth Proportional to 12,311.28, 16,989.48 and 6,722.28

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Solution

The fourth proportional to 12,311.28, 16,989.48 and 6,722.28 is: 9,276.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,311.28 : 16,989.48 = 6,722.28 : x
  2. Step 2: Convert to fraction form
    12,311.28/16,989.48 = 6,722.28/x
  3. Step 3: Cross multiply
    12,311.28x = 16,989.48 × 6,722.28
  4. Step 4: Simplify right side
    12,311.28x = 114,208,041.61
  5. Step 5: Solve for x
    x = 114,208,041.61/12,311.28
  6. Step 6: Final answer
    x = 9,276.70

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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.