Home / 20,155.40-30,221.28-6,111.20

Finding the Fourth Proportional to 20,155.40, 30,221.28 and 6,111.20

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Solution

The fourth proportional to 20,155.40, 30,221.28 and 6,111.20 is: 9,163.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.40 : 30,221.28 = 6,111.20 : x
  2. Step 2: Convert to fraction form
    20,155.40/30,221.28 = 6,111.20/x
  3. Step 3: Cross multiply
    20,155.40x = 30,221.28 × 6,111.20
  4. Step 4: Simplify right side
    20,155.40x = 184,688,286.34
  5. Step 5: Solve for x
    x = 184,688,286.34/20,155.40
  6. Step 6: Final answer
    x = 9,163.22

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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.