Home / 20,278.35-30,419.10-7,133.67

Finding the Fourth Proportional to 20,278.35, 30,419.10 and 7,133.67

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Solution

The fourth proportional to 20,278.35, 30,419.10 and 7,133.67 is: 10,701.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.35 : 30,419.10 = 7,133.67 : x
  2. Step 2: Convert to fraction form
    20,278.35/30,419.10 = 7,133.67/x
  3. Step 3: Cross multiply
    20,278.35x = 30,419.10 × 7,133.67
  4. Step 4: Simplify right side
    20,278.35x = 216,999,821.10
  5. Step 5: Solve for x
    x = 216,999,821.10/20,278.35
  6. Step 6: Final answer
    x = 10,701.06

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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.