Home / 21,011.40-31,523.10-12,693.96

Finding the Fourth Proportional to 21,011.40, 31,523.10 and 12,693.96

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Solution

The fourth proportional to 21,011.40, 31,523.10 and 12,693.96 is: 19,044.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.40 : 31,523.10 = 12,693.96 : x
  2. Step 2: Convert to fraction form
    21,011.40/31,523.10 = 12,693.96/x
  3. Step 3: Cross multiply
    21,011.40x = 31,523.10 × 12,693.96
  4. Step 4: Simplify right side
    21,011.40x = 400,152,970.48
  5. Step 5: Solve for x
    x = 400,152,970.48/21,011.40
  6. Step 6: Final answer
    x = 19,044.56

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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.