Home / 28,171.37-38,875.02-15,422.12

Finding the Fourth Proportional to 28,171.37, 38,875.02 and 15,422.12

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Solution

The fourth proportional to 28,171.37, 38,875.02 and 15,422.12 is: 21,281.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,171.37 : 38,875.02 = 15,422.12 : x
  2. Step 2: Convert to fraction form
    28,171.37/38,875.02 = 15,422.12/x
  3. Step 3: Cross multiply
    28,171.37x = 38,875.02 × 15,422.12
  4. Step 4: Simplify right side
    28,171.37x = 599,535,000.15
  5. Step 5: Solve for x
    x = 599,535,000.15/28,171.37
  6. Step 6: Final answer
    x = 21,281.71

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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.