Home / 20,878.04-31,318.53-8,398.14

Finding the Fourth Proportional to 20,878.04, 31,318.53 and 8,398.14

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Solution

The fourth proportional to 20,878.04, 31,318.53 and 8,398.14 is: 12,597.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.04 : 31,318.53 = 8,398.14 : x
  2. Step 2: Convert to fraction form
    20,878.04/31,318.53 = 8,398.14/x
  3. Step 3: Cross multiply
    20,878.04x = 31,318.53 × 8,398.14
  4. Step 4: Simplify right side
    20,878.04x = 263,017,399.53
  5. Step 5: Solve for x
    x = 263,017,399.53/20,878.04
  6. Step 6: Final answer
    x = 12,597.80

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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.