Home / 15,611.40-21,529.68-10,311.56

Finding the Fourth Proportional to 15,611.40, 21,529.68 and 10,311.56

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Solution

The fourth proportional to 15,611.40, 21,529.68 and 10,311.56 is: 14,220.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,611.40 : 21,529.68 = 10,311.56 : x
  2. Step 2: Convert to fraction form
    15,611.40/21,529.68 = 10,311.56/x
  3. Step 3: Cross multiply
    15,611.40x = 21,529.68 × 10,311.56
  4. Step 4: Simplify right side
    15,611.40x = 222,004,587.10
  5. Step 5: Solve for x
    x = 222,004,587.10/15,611.40
  6. Step 6: Final answer
    x = 14,220.67

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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.