Home / 28,158.48-38,859.12-15,583.68

Finding the Fourth Proportional to 28,158.48, 38,859.12 and 15,583.68

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Solution

The fourth proportional to 28,158.48, 38,859.12 and 15,583.68 is: 21,505.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,158.48 : 38,859.12 = 15,583.68 : x
  2. Step 2: Convert to fraction form
    28,158.48/38,859.12 = 15,583.68/x
  3. Step 3: Cross multiply
    28,158.48x = 38,859.12 × 15,583.68
  4. Step 4: Simplify right side
    28,158.48x = 605,568,091.16
  5. Step 5: Solve for x
    x = 605,568,091.16/28,158.48
  6. Step 6: Final answer
    x = 21,505.71

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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.