Home / 21,136.56-31,715.64-10,748.28

Finding the Fourth Proportional to 21,136.56, 31,715.64 and 10,748.28

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Solution

The fourth proportional to 21,136.56, 31,715.64 and 10,748.28 is: 16,127.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.56 : 31,715.64 = 10,748.28 : x
  2. Step 2: Convert to fraction form
    21,136.56/31,715.64 = 10,748.28/x
  3. Step 3: Cross multiply
    21,136.56x = 31,715.64 × 10,748.28
  4. Step 4: Simplify right side
    21,136.56x = 340,888,579.10
  5. Step 5: Solve for x
    x = 340,888,579.10/21,136.56
  6. Step 6: Final answer
    x = 16,127.91

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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.