Home / 21,129.09-31,694.37-10,030.06

Finding the Fourth Proportional to 21,129.09, 31,694.37 and 10,030.06

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Solution

The fourth proportional to 21,129.09, 31,694.37 and 10,030.06 is: 15,045.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.09 : 31,694.37 = 10,030.06 : x
  2. Step 2: Convert to fraction form
    21,129.09/31,694.37 = 10,030.06/x
  3. Step 3: Cross multiply
    21,129.09x = 31,694.37 × 10,030.06
  4. Step 4: Simplify right side
    21,129.09x = 317,896,432.76
  5. Step 5: Solve for x
    x = 317,896,432.76/21,129.09
  6. Step 6: Final answer
    x = 15,045.44

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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.