Home / 19,981.28-29,983.80-8,888.60

Finding the Fourth Proportional to 19,981.28, 29,983.80 and 8,888.60

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Solution

The fourth proportional to 19,981.28, 29,983.80 and 8,888.60 is: 13,338.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,981.28 : 29,983.80 = 8,888.60 : x
  2. Step 2: Convert to fraction form
    19,981.28/29,983.80 = 8,888.60/x
  3. Step 3: Cross multiply
    19,981.28x = 29,983.80 × 8,888.60
  4. Step 4: Simplify right side
    19,981.28x = 266,514,004.68
  5. Step 5: Solve for x
    x = 266,514,004.68/19,981.28
  6. Step 6: Final answer
    x = 13,338.18

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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.