Home / 22,985.12-31,717.16-12,912.80

Finding the Fourth Proportional to 22,985.12, 31,717.16 and 12,912.80

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Solution

The fourth proportional to 22,985.12, 31,717.16 and 12,912.80 is: 17,818.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,985.12 : 31,717.16 = 12,912.80 : x
  2. Step 2: Convert to fraction form
    22,985.12/31,717.16 = 12,912.80/x
  3. Step 3: Cross multiply
    22,985.12x = 31,717.16 × 12,912.80
  4. Step 4: Simplify right side
    22,985.12x = 409,557,343.65
  5. Step 5: Solve for x
    x = 409,557,343.65/22,985.12
  6. Step 6: Final answer
    x = 17,818.37

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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.