Home / 20,219.60-30,315.04-7,729.10

Finding the Fourth Proportional to 20,219.60, 30,315.04 and 7,729.10

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Solution

The fourth proportional to 20,219.60, 30,315.04 and 7,729.10 is: 11,588.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.60 : 30,315.04 = 7,729.10 : x
  2. Step 2: Convert to fraction form
    20,219.60/30,315.04 = 7,729.10/x
  3. Step 3: Cross multiply
    20,219.60x = 30,315.04 × 7,729.10
  4. Step 4: Simplify right side
    20,219.60x = 234,307,975.66
  5. Step 5: Solve for x
    x = 234,307,975.66/20,219.60
  6. Step 6: Final answer
    x = 11,588.16

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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.