Home / 13,871.90-19,159.62-9,387.86

Finding the Fourth Proportional to 13,871.90, 19,159.62 and 9,387.86

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Solution

The fourth proportional to 13,871.90, 19,159.62 and 9,387.86 is: 12,966.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,871.90 : 19,159.62 = 9,387.86 : x
  2. Step 2: Convert to fraction form
    13,871.90/19,159.62 = 9,387.86/x
  3. Step 3: Cross multiply
    13,871.90x = 19,159.62 × 9,387.86
  4. Step 4: Simplify right side
    13,871.90x = 179,867,830.21
  5. Step 5: Solve for x
    x = 179,867,830.21/13,871.90
  6. Step 6: Final answer
    x = 12,966.34

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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.