Home / 28,157.52-38,872.80-19,218.36

Finding the Fourth Proportional to 28,157.52, 38,872.80 and 19,218.36

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Solution

The fourth proportional to 28,157.52, 38,872.80 and 19,218.36 is: 26,531.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,157.52 : 38,872.80 = 19,218.36 : x
  2. Step 2: Convert to fraction form
    28,157.52/38,872.80 = 19,218.36/x
  3. Step 3: Cross multiply
    28,157.52x = 38,872.80 × 19,218.36
  4. Step 4: Simplify right side
    28,157.52x = 747,071,464.61
  5. Step 5: Solve for x
    x = 747,071,464.61/28,157.52
  6. Step 6: Final answer
    x = 26,531.86

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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.