Home / 21,126.99-31,679.55-11,263.62

Finding the Fourth Proportional to 21,126.99, 31,679.55 and 11,263.62

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Solution

The fourth proportional to 21,126.99, 31,679.55 and 11,263.62 is: 16,889.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.99 : 31,679.55 = 11,263.62 : x
  2. Step 2: Convert to fraction form
    21,126.99/31,679.55 = 11,263.62/x
  3. Step 3: Cross multiply
    21,126.99x = 31,679.55 × 11,263.62
  4. Step 4: Simplify right side
    21,126.99x = 356,826,412.97
  5. Step 5: Solve for x
    x = 356,826,412.97/21,126.99
  6. Step 6: Final answer
    x = 16,889.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.