Home / 21,390.18-32,073.80-11,905.49

Finding the Fourth Proportional to 21,390.18, 32,073.80 and 11,905.49

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Solution

The fourth proportional to 21,390.18, 32,073.80 and 11,905.49 is: 17,851.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.18 : 32,073.80 = 11,905.49 : x
  2. Step 2: Convert to fraction form
    21,390.18/32,073.80 = 11,905.49/x
  3. Step 3: Cross multiply
    21,390.18x = 32,073.80 × 11,905.49
  4. Step 4: Simplify right side
    21,390.18x = 381,854,085.27
  5. Step 5: Solve for x
    x = 381,854,085.27/21,390.18
  6. Step 6: Final answer
    x = 17,851.84

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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.