Home / 21,052.48-31,498.50-18,719.68

Finding the Fourth Proportional to 21,052.48, 31,498.50 and 18,719.68

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Solution

The fourth proportional to 21,052.48, 31,498.50 and 18,719.68 is: 28,008.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,052.48 : 31,498.50 = 18,719.68 : x
  2. Step 2: Convert to fraction form
    21,052.48/31,498.50 = 18,719.68/x
  3. Step 3: Cross multiply
    21,052.48x = 31,498.50 × 18,719.68
  4. Step 4: Simplify right side
    21,052.48x = 589,641,840.48
  5. Step 5: Solve for x
    x = 589,641,840.48/21,052.48
  6. Step 6: Final answer
    x = 28,008.19

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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.