Home / 28,990.07-40,005.78-16,243.20

Finding the Fourth Proportional to 28,990.07, 40,005.78 and 16,243.20

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Solution

The fourth proportional to 28,990.07, 40,005.78 and 16,243.20 is: 22,415.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,990.07 : 40,005.78 = 16,243.20 : x
  2. Step 2: Convert to fraction form
    28,990.07/40,005.78 = 16,243.20/x
  3. Step 3: Cross multiply
    28,990.07x = 40,005.78 × 16,243.20
  4. Step 4: Simplify right side
    28,990.07x = 649,821,824.78
  5. Step 5: Solve for x
    x = 649,821,824.78/28,990.07
  6. Step 6: Final answer
    x = 22,415.33

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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.