Home / 22,491.36-31,008.96-15,405.12

Finding the Fourth Proportional to 22,491.36, 31,008.96 and 15,405.12

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Solution

The fourth proportional to 22,491.36, 31,008.96 and 15,405.12 is: 21,239.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,491.36 : 31,008.96 = 15,405.12 : x
  2. Step 2: Convert to fraction form
    22,491.36/31,008.96 = 15,405.12/x
  3. Step 3: Cross multiply
    22,491.36x = 31,008.96 × 15,405.12
  4. Step 4: Simplify right side
    22,491.36x = 477,696,749.88
  5. Step 5: Solve for x
    x = 477,696,749.88/22,491.36
  6. Step 6: Final answer
    x = 21,239.12

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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.