Home / 20,855.81-31,287.90-9,169.04

Finding the Fourth Proportional to 20,855.81, 31,287.90 and 9,169.04

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Solution

The fourth proportional to 20,855.81, 31,287.90 and 9,169.04 is: 13,755.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.81 : 31,287.90 = 9,169.04 : x
  2. Step 2: Convert to fraction form
    20,855.81/31,287.90 = 9,169.04/x
  3. Step 3: Cross multiply
    20,855.81x = 31,287.90 × 9,169.04
  4. Step 4: Simplify right side
    20,855.81x = 286,880,006.62
  5. Step 5: Solve for x
    x = 286,880,006.62/20,855.81
  6. Step 6: Final answer
    x = 13,755.40

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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.