Home / 20,209.65-30,318.14-8,356.98

Finding the Fourth Proportional to 20,209.65, 30,318.14 and 8,356.98

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Solution

The fourth proportional to 20,209.65, 30,318.14 and 8,356.98 is: 12,536.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,209.65 : 30,318.14 = 8,356.98 : x
  2. Step 2: Convert to fraction form
    20,209.65/30,318.14 = 8,356.98/x
  3. Step 3: Cross multiply
    20,209.65x = 30,318.14 × 8,356.98
  4. Step 4: Simplify right side
    20,209.65x = 253,368,047.83
  5. Step 5: Solve for x
    x = 253,368,047.83/20,209.65
  6. Step 6: Final answer
    x = 12,536.98

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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.