Home / 20,304.32-28,019.86-11,351.81

Finding the Fourth Proportional to 20,304.32, 28,019.86 and 11,351.81

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Solution

The fourth proportional to 20,304.32, 28,019.86 and 11,351.81 is: 15,665.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,304.32 : 28,019.86 = 11,351.81 : x
  2. Step 2: Convert to fraction form
    20,304.32/28,019.86 = 11,351.81/x
  3. Step 3: Cross multiply
    20,304.32x = 28,019.86 × 11,351.81
  4. Step 4: Simplify right side
    20,304.32x = 318,076,168.62
  5. Step 5: Solve for x
    x = 318,076,168.62/20,304.32
  6. Step 6: Final answer
    x = 15,665.45

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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.