Home / 21,056.12-31,585.86-12,291.92

Finding the Fourth Proportional to 21,056.12, 31,585.86 and 12,291.92

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Solution

The fourth proportional to 21,056.12, 31,585.86 and 12,291.92 is: 18,438.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,056.12 : 31,585.86 = 12,291.92 : x
  2. Step 2: Convert to fraction form
    21,056.12/31,585.86 = 12,291.92/x
  3. Step 3: Cross multiply
    21,056.12x = 31,585.86 × 12,291.92
  4. Step 4: Simplify right side
    21,056.12x = 388,250,864.25
  5. Step 5: Solve for x
    x = 388,250,864.25/21,056.12
  6. Step 6: Final answer
    x = 18,438.86

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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.