Home / 18,785.40-28,157.76-12,216.30

Finding the Fourth Proportional to 18,785.40, 28,157.76 and 12,216.30

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Solution

The fourth proportional to 18,785.40, 28,157.76 and 12,216.30 is: 18,311.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.40 : 28,157.76 = 12,216.30 : x
  2. Step 2: Convert to fraction form
    18,785.40/28,157.76 = 12,216.30/x
  3. Step 3: Cross multiply
    18,785.40x = 28,157.76 × 12,216.30
  4. Step 4: Simplify right side
    18,785.40x = 343,983,643.49
  5. Step 5: Solve for x
    x = 343,983,643.49/18,785.40
  6. Step 6: Final answer
    x = 18,311.22

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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.