Home / 21,582.12-29,781.18-15,919.93

Finding the Fourth Proportional to 21,582.12, 29,781.18 and 15,919.93

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Solution

The fourth proportional to 21,582.12, 29,781.18 and 15,919.93 is: 21,967.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,582.12 : 29,781.18 = 15,919.93 : x
  2. Step 2: Convert to fraction form
    21,582.12/29,781.18 = 15,919.93/x
  3. Step 3: Cross multiply
    21,582.12x = 29,781.18 × 15,919.93
  4. Step 4: Simplify right side
    21,582.12x = 474,114,226.46
  5. Step 5: Solve for x
    x = 474,114,226.46/21,582.12
  6. Step 6: Final answer
    x = 21,967.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.