Home / 21,221.61-31,823.75-9,214.53

Finding the Fourth Proportional to 21,221.61, 31,823.75 and 9,214.53

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Solution

The fourth proportional to 21,221.61, 31,823.75 and 9,214.53 is: 13,818.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.61 : 31,823.75 = 9,214.53 : x
  2. Step 2: Convert to fraction form
    21,221.61/31,823.75 = 9,214.53/x
  3. Step 3: Cross multiply
    21,221.61x = 31,823.75 × 9,214.53
  4. Step 4: Simplify right side
    21,221.61x = 293,240,853.01
  5. Step 5: Solve for x
    x = 293,240,853.01/21,221.61
  6. Step 6: Final answer
    x = 13,818.03

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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.