Home / 21,106.44-31,565.16-18,780.12

Finding the Fourth Proportional to 21,106.44, 31,565.16 and 18,780.12

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Solution

The fourth proportional to 21,106.44, 31,565.16 and 18,780.12 is: 28,086.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.44 : 31,565.16 = 18,780.12 : x
  2. Step 2: Convert to fraction form
    21,106.44/31,565.16 = 18,780.12/x
  3. Step 3: Cross multiply
    21,106.44x = 31,565.16 × 18,780.12
  4. Step 4: Simplify right side
    21,106.44x = 592,797,492.62
  5. Step 5: Solve for x
    x = 592,797,492.62/21,106.44
  6. Step 6: Final answer
    x = 28,086.10

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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.