Home / 13,156.54-18,156.28-7,188.58

Finding the Fourth Proportional to 13,156.54, 18,156.28 and 7,188.58

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Solution

The fourth proportional to 13,156.54, 18,156.28 and 7,188.58 is: 9,920.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.54 : 18,156.28 = 7,188.58 : x
  2. Step 2: Convert to fraction form
    13,156.54/18,156.28 = 7,188.58/x
  3. Step 3: Cross multiply
    13,156.54x = 18,156.28 × 7,188.58
  4. Step 4: Simplify right side
    13,156.54x = 130,517,789.49
  5. Step 5: Solve for x
    x = 130,517,789.49/13,156.54
  6. Step 6: Final answer
    x = 9,920.38

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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.