Home / 21,929.40-32,918.40-13,618.80

Finding the Fourth Proportional to 21,929.40, 32,918.40 and 13,618.80

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Solution

The fourth proportional to 21,929.40, 32,918.40 and 13,618.80 is: 20,443.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,929.40 : 32,918.40 = 13,618.80 : x
  2. Step 2: Convert to fraction form
    21,929.40/32,918.40 = 13,618.80/x
  3. Step 3: Cross multiply
    21,929.40x = 32,918.40 × 13,618.80
  4. Step 4: Simplify right side
    21,929.40x = 448,309,105.92
  5. Step 5: Solve for x
    x = 448,309,105.92/21,929.40
  6. Step 6: Final answer
    x = 20,443.29

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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.