Home / 15,311.15-21,128.69-8,596.65

Finding the Fourth Proportional to 15,311.15, 21,128.69 and 8,596.65

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Solution

The fourth proportional to 15,311.15, 21,128.69 and 8,596.65 is: 11,862.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,311.15 : 21,128.69 = 8,596.65 : x
  2. Step 2: Convert to fraction form
    15,311.15/21,128.69 = 8,596.65/x
  3. Step 3: Cross multiply
    15,311.15x = 21,128.69 × 8,596.65
  4. Step 4: Simplify right side
    15,311.15x = 181,635,952.89
  5. Step 5: Solve for x
    x = 181,635,952.89/15,311.15
  6. Step 6: Final answer
    x = 11,862.99

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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.