Home / 30,944.46-42,738.12-20,855.28

Finding the Fourth Proportional to 30,944.46, 42,738.12 and 20,855.28

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Solution

The fourth proportional to 30,944.46, 42,738.12 and 20,855.28 is: 28,803.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,944.46 : 42,738.12 = 20,855.28 : x
  2. Step 2: Convert to fraction form
    30,944.46/42,738.12 = 20,855.28/x
  3. Step 3: Cross multiply
    30,944.46x = 42,738.12 × 20,855.28
  4. Step 4: Simplify right side
    30,944.46x = 891,315,459.27
  5. Step 5: Solve for x
    x = 891,315,459.27/30,944.46
  6. Step 6: Final answer
    x = 28,803.72

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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.