Home / 21,580.13-29,780.11-12,019.98

Finding the Fourth Proportional to 21,580.13, 29,780.11 and 12,019.98

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Solution

The fourth proportional to 21,580.13, 29,780.11 and 12,019.98 is: 16,587.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,580.13 : 29,780.11 = 12,019.98 : x
  2. Step 2: Convert to fraction form
    21,580.13/29,780.11 = 12,019.98/x
  3. Step 3: Cross multiply
    21,580.13x = 29,780.11 × 12,019.98
  4. Step 4: Simplify right side
    21,580.13x = 357,956,326.60
  5. Step 5: Solve for x
    x = 357,956,326.60/21,580.13
  6. Step 6: Final answer
    x = 16,587.31

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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.