Home / 21,432.15-29,575.68-11,871.65

Finding the Fourth Proportional to 21,432.15, 29,575.68 and 11,871.65

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Solution

The fourth proportional to 21,432.15, 29,575.68 and 11,871.65 is: 16,382.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,432.15 : 29,575.68 = 11,871.65 : x
  2. Step 2: Convert to fraction form
    21,432.15/29,575.68 = 11,871.65/x
  3. Step 3: Cross multiply
    21,432.15x = 29,575.68 × 11,871.65
  4. Step 4: Simplify right side
    21,432.15x = 351,111,973.59
  5. Step 5: Solve for x
    x = 351,111,973.59/21,432.15
  6. Step 6: Final answer
    x = 16,382.49

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1.5x scale

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.