Home / 21,148.47-31,722.93-8,504.09

Finding the Fourth Proportional to 21,148.47, 31,722.93 and 8,504.09

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Solution

The fourth proportional to 21,148.47, 31,722.93 and 8,504.09 is: 12,756.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,148.47 : 31,722.93 = 8,504.09 : x
  2. Step 2: Convert to fraction form
    21,148.47/31,722.93 = 8,504.09/x
  3. Step 3: Cross multiply
    21,148.47x = 31,722.93 × 8,504.09
  4. Step 4: Simplify right side
    21,148.47x = 269,774,493.17
  5. Step 5: Solve for x
    x = 269,774,493.17/21,148.47
  6. Step 6: Final answer
    x = 12,756.22

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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.