Home / 18,739.89-28,088.64-7,643.70

Finding the Fourth Proportional to 18,739.89, 28,088.64 and 7,643.70

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Solution

The fourth proportional to 18,739.89, 28,088.64 and 7,643.70 is: 11,456.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,739.89 : 28,088.64 = 7,643.70 : x
  2. Step 2: Convert to fraction form
    18,739.89/28,088.64 = 7,643.70/x
  3. Step 3: Cross multiply
    18,739.89x = 28,088.64 × 7,643.70
  4. Step 4: Simplify right side
    18,739.89x = 214,701,137.57
  5. Step 5: Solve for x
    x = 214,701,137.57/18,739.89
  6. Step 6: Final answer
    x = 11,456.90

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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.