Home / 21,101.93-31,643.66-10,011.78

Finding the Fourth Proportional to 21,101.93, 31,643.66 and 10,011.78

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Solution

The fourth proportional to 21,101.93, 31,643.66 and 10,011.78 is: 15,013.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101.93 : 31,643.66 = 10,011.78 : x
  2. Step 2: Convert to fraction form
    21,101.93/31,643.66 = 10,011.78/x
  3. Step 3: Cross multiply
    21,101.93x = 31,643.66 × 10,011.78
  4. Step 4: Simplify right side
    21,101.93x = 316,809,362.31
  5. Step 5: Solve for x
    x = 316,809,362.31/21,101.93
  6. Step 6: Final answer
    x = 15,013.29

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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.