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Finding the Fourth Proportional to 13,156.58, 18,156.44 and 7,854.48

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Solution

The fourth proportional to 13,156.58, 18,156.44 and 7,854.48 is: 10,839.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.58 : 18,156.44 = 7,854.48 : x
  2. Step 2: Convert to fraction form
    13,156.58/18,156.44 = 7,854.48/x
  3. Step 3: Cross multiply
    13,156.58x = 18,156.44 × 7,854.48
  4. Step 4: Simplify right side
    13,156.58x = 142,609,394.85
  5. Step 5: Solve for x
    x = 142,609,394.85/13,156.58
  6. Step 6: Final answer
    x = 10,839.40

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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.