Home / 28,171.24-38,875.72-15,424.12

Finding the Fourth Proportional to 28,171.24, 38,875.72 and 15,424.12

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Solution

The fourth proportional to 28,171.24, 38,875.72 and 15,424.12 is: 21,284.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,171.24 : 38,875.72 = 15,424.12 : x
  2. Step 2: Convert to fraction form
    28,171.24/38,875.72 = 15,424.12/x
  3. Step 3: Cross multiply
    28,171.24x = 38,875.72 × 15,424.12
  4. Step 4: Simplify right side
    28,171.24x = 599,623,770.37
  5. Step 5: Solve for x
    x = 599,623,770.37/28,171.24
  6. Step 6: Final answer
    x = 21,284.96

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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.