Home / 21,116.16-31,681.26-10,021.50

Finding the Fourth Proportional to 21,116.16, 31,681.26 and 10,021.50

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Solution

The fourth proportional to 21,116.16, 31,681.26 and 10,021.50 is: 15,035.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.16 : 31,681.26 = 10,021.50 : x
  2. Step 2: Convert to fraction form
    21,116.16/31,681.26 = 10,021.50/x
  3. Step 3: Cross multiply
    21,116.16x = 31,681.26 × 10,021.50
  4. Step 4: Simplify right side
    21,116.16x = 317,493,747.09
  5. Step 5: Solve for x
    x = 317,493,747.09/21,116.16
  6. Step 6: Final answer
    x = 15,035.58

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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.