Home / 21,001.28-31,460.64-12,217.52

Finding the Fourth Proportional to 21,001.28, 31,460.64 and 12,217.52

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Solution

The fourth proportional to 21,001.28, 31,460.64 and 12,217.52 is: 18,302.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.28 : 31,460.64 = 12,217.52 : x
  2. Step 2: Convert to fraction form
    21,001.28/31,460.64 = 12,217.52/x
  3. Step 3: Cross multiply
    21,001.28x = 31,460.64 × 12,217.52
  4. Step 4: Simplify right side
    21,001.28x = 384,370,998.41
  5. Step 5: Solve for x
    x = 384,370,998.41/21,001.28
  6. Step 6: Final answer
    x = 18,302.27

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1.5x scale

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.