Home / 18,669.68-28,007.16-6,981.78

Finding the Fourth Proportional to 18,669.68, 28,007.16 and 6,981.78

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Solution

The fourth proportional to 18,669.68, 28,007.16 and 6,981.78 is: 10,473.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,669.68 : 28,007.16 = 6,981.78 : x
  2. Step 2: Convert to fraction form
    18,669.68/28,007.16 = 6,981.78/x
  3. Step 3: Cross multiply
    18,669.68x = 28,007.16 × 6,981.78
  4. Step 4: Simplify right side
    18,669.68x = 195,539,829.54
  5. Step 5: Solve for x
    x = 195,539,829.54/18,669.68
  6. Step 6: Final answer
    x = 10,473.66

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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.