Home / 12,909.20-19,315.20-8,535.20

Finding the Fourth Proportional to 12,909.20, 19,315.20 and 8,535.20

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Solution

The fourth proportional to 12,909.20, 19,315.20 and 8,535.20 is: 12,770.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.20 : 19,315.20 = 8,535.20 : x
  2. Step 2: Convert to fraction form
    12,909.20/19,315.20 = 8,535.20/x
  3. Step 3: Cross multiply
    12,909.20x = 19,315.20 × 8,535.20
  4. Step 4: Simplify right side
    12,909.20x = 164,859,095.04
  5. Step 5: Solve for x
    x = 164,859,095.04/12,909.20
  6. Step 6: Final answer
    x = 12,770.67

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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.