Home / 18,718.50-28,077.62-7,622.58

Finding the Fourth Proportional to 18,718.50, 28,077.62 and 7,622.58

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Solution

The fourth proportional to 18,718.50, 28,077.62 and 7,622.58 is: 11,433.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718.50 : 28,077.62 = 7,622.58 : x
  2. Step 2: Convert to fraction form
    18,718.50/28,077.62 = 7,622.58/x
  3. Step 3: Cross multiply
    18,718.50x = 28,077.62 × 7,622.58
  4. Step 4: Simplify right side
    18,718.50x = 214,023,866.55
  5. Step 5: Solve for x
    x = 214,023,866.55/18,718.50
  6. Step 6: Final answer
    x = 11,433.82

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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.