Home / 28,389.81-42,589.86-11,740.80

Finding the Fourth Proportional to 28,389.81, 42,589.86 and 11,740.80

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Solution

The fourth proportional to 28,389.81, 42,589.86 and 11,740.80 is: 17,613.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,389.81 : 42,589.86 = 11,740.80 : x
  2. Step 2: Convert to fraction form
    28,389.81/42,589.86 = 11,740.80/x
  3. Step 3: Cross multiply
    28,389.81x = 42,589.86 × 11,740.80
  4. Step 4: Simplify right side
    28,389.81x = 500,039,028.29
  5. Step 5: Solve for x
    x = 500,039,028.29/28,389.81
  6. Step 6: Final answer
    x = 17,613.33

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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.