Home / 28,921.64-43,377.12-13,122.86

Finding the Fourth Proportional to 28,921.64, 43,377.12 and 13,122.86

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Solution

The fourth proportional to 28,921.64, 43,377.12 and 13,122.86 is: 19,681.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,921.64 : 43,377.12 = 13,122.86 : x
  2. Step 2: Convert to fraction form
    28,921.64/43,377.12 = 13,122.86/x
  3. Step 3: Cross multiply
    28,921.64x = 43,377.12 × 13,122.86
  4. Step 4: Simplify right side
    28,921.64x = 569,231,656.08
  5. Step 5: Solve for x
    x = 569,231,656.08/28,921.64
  6. Step 6: Final answer
    x = 19,681.86

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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.