Home / 20,510.87-28,314.45-12,011.81

Finding the Fourth Proportional to 20,510.87, 28,314.45 and 12,011.81

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Solution

The fourth proportional to 20,510.87, 28,314.45 and 12,011.81 is: 16,581.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.87 : 28,314.45 = 12,011.81 : x
  2. Step 2: Convert to fraction form
    20,510.87/28,314.45 = 12,011.81/x
  3. Step 3: Cross multiply
    20,510.87x = 28,314.45 × 12,011.81
  4. Step 4: Simplify right side
    20,510.87x = 340,107,793.65
  5. Step 5: Solve for x
    x = 340,107,793.65/20,510.87
  6. Step 6: Final answer
    x = 16,581.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.