Home / 20,199.84-30,312.38-7,720.92

Finding the Fourth Proportional to 20,199.84, 30,312.38 and 7,720.92

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Solution

The fourth proportional to 20,199.84, 30,312.38 and 7,720.92 is: 11,586.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,199.84 : 30,312.38 = 7,720.92 : x
  2. Step 2: Convert to fraction form
    20,199.84/30,312.38 = 7,720.92/x
  3. Step 3: Cross multiply
    20,199.84x = 30,312.38 × 7,720.92
  4. Step 4: Simplify right side
    20,199.84x = 234,039,460.99
  5. Step 5: Solve for x
    x = 234,039,460.99/20,199.84
  6. Step 6: Final answer
    x = 11,586.20

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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.