Home / 21,238.56-29,309.96-11,679.17

Finding the Fourth Proportional to 21,238.56, 29,309.96 and 11,679.17

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Solution

The fourth proportional to 21,238.56, 29,309.96 and 11,679.17 is: 16,117.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,238.56 : 29,309.96 = 11,679.17 : x
  2. Step 2: Convert to fraction form
    21,238.56/29,309.96 = 11,679.17/x
  3. Step 3: Cross multiply
    21,238.56x = 29,309.96 × 11,679.17
  4. Step 4: Simplify right side
    21,238.56x = 342,316,005.53
  5. Step 5: Solve for x
    x = 342,316,005.53/21,238.56
  6. Step 6: Final answer
    x = 16,117.67

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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.