Home / 15,855.08-21,882.72-9,139.52

Finding the Fourth Proportional to 15,855.08, 21,882.72 and 9,139.52

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Solution

The fourth proportional to 15,855.08, 21,882.72 and 9,139.52 is: 12,614.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,855.08 : 21,882.72 = 9,139.52 : x
  2. Step 2: Convert to fraction form
    15,855.08/21,882.72 = 9,139.52/x
  3. Step 3: Cross multiply
    15,855.08x = 21,882.72 × 9,139.52
  4. Step 4: Simplify right side
    15,855.08x = 199,997,557.09
  5. Step 5: Solve for x
    x = 199,997,557.09/15,855.08
  6. Step 6: Final answer
    x = 12,614.10

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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.