Home / 21,038.71-31,570.14-8,556.43

Finding the Fourth Proportional to 21,038.71, 31,570.14 and 8,556.43

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Solution

The fourth proportional to 21,038.71, 31,570.14 and 8,556.43 is: 12,839.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,038.71 : 31,570.14 = 8,556.43 : x
  2. Step 2: Convert to fraction form
    21,038.71/31,570.14 = 8,556.43/x
  3. Step 3: Cross multiply
    21,038.71x = 31,570.14 × 8,556.43
  4. Step 4: Simplify right side
    21,038.71x = 270,127,693.00
  5. Step 5: Solve for x
    x = 270,127,693.00/21,038.71
  6. Step 6: Final answer
    x = 12,839.56

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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.