Home / 15,837.30-21,855.20-9,122.91

Finding the Fourth Proportional to 15,837.30, 21,855.20 and 9,122.91

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Solution

The fourth proportional to 15,837.30, 21,855.20 and 9,122.91 is: 12,589.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,837.30 : 21,855.20 = 9,122.91 : x
  2. Step 2: Convert to fraction form
    15,837.30/21,855.20 = 9,122.91/x
  3. Step 3: Cross multiply
    15,837.30x = 21,855.20 × 9,122.91
  4. Step 4: Simplify right side
    15,837.30x = 199,382,895.06
  5. Step 5: Solve for x
    x = 199,382,895.06/15,837.30
  6. Step 6: Final answer
    x = 12,589.45

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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.