Home / 15,722.91-21,697.57-8,649.28

Finding the Fourth Proportional to 15,722.91, 21,697.57 and 8,649.28

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Solution

The fourth proportional to 15,722.91, 21,697.57 and 8,649.28 is: 11,935.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,722.91 : 21,697.57 = 8,649.28 : x
  2. Step 2: Convert to fraction form
    15,722.91/21,697.57 = 8,649.28/x
  3. Step 3: Cross multiply
    15,722.91x = 21,697.57 × 8,649.28
  4. Step 4: Simplify right side
    15,722.91x = 187,668,396.18
  5. Step 5: Solve for x
    x = 187,668,396.18/15,722.91
  6. Step 6: Final answer
    x = 11,935.98

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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.