Home / 20,555.90-30,837.06-8,709.69

Finding the Fourth Proportional to 20,555.90, 30,837.06 and 8,709.69

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Solution

The fourth proportional to 20,555.90, 30,837.06 and 8,709.69 is: 13,065.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,555.90 : 30,837.06 = 8,709.69 : x
  2. Step 2: Convert to fraction form
    20,555.90/30,837.06 = 8,709.69/x
  3. Step 3: Cross multiply
    20,555.90x = 30,837.06 × 8,709.69
  4. Step 4: Simplify right side
    20,555.90x = 268,581,233.11
  5. Step 5: Solve for x
    x = 268,581,233.11/20,555.90
  6. Step 6: Final answer
    x = 13,065.90

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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.