Home / 28,286.96-42,386.70-20,856.04

Finding the Fourth Proportional to 28,286.96, 42,386.70 and 20,856.04

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Solution

The fourth proportional to 28,286.96, 42,386.70 and 20,856.04 is: 31,251.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,286.96 : 42,386.70 = 20,856.04 : x
  2. Step 2: Convert to fraction form
    28,286.96/42,386.70 = 20,856.04/x
  3. Step 3: Cross multiply
    28,286.96x = 42,386.70 × 20,856.04
  4. Step 4: Simplify right side
    28,286.96x = 884,018,710.67
  5. Step 5: Solve for x
    x = 884,018,710.67/28,286.96
  6. Step 6: Final answer
    x = 31,251.81

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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.