Home / 12,121.65-18,174.38-9,784.53

Finding the Fourth Proportional to 12,121.65, 18,174.38 and 9,784.53

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Solution

The fourth proportional to 12,121.65, 18,174.38 and 9,784.53 is: 14,670.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.65 : 18,174.38 = 9,784.53 : x
  2. Step 2: Convert to fraction form
    12,121.65/18,174.38 = 9,784.53/x
  3. Step 3: Cross multiply
    12,121.65x = 18,174.38 × 9,784.53
  4. Step 4: Simplify right side
    12,121.65x = 177,827,717.42
  5. Step 5: Solve for x
    x = 177,827,717.42/12,121.65
  6. Step 6: Final answer
    x = 14,670.26

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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.