Home / 13,123.44-18,110.10-7,155

Finding the Fourth Proportional to 13,123.44, 18,110.10 and 7,155

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Solution

The fourth proportional to 13,123.44, 18,110.10 and 7,155 is: 9,873.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,123.44 : 18,110.10 = 7,155 : x
  2. Step 2: Convert to fraction form
    13,123.44/18,110.10 = 7,155/x
  3. Step 3: Cross multiply
    13,123.44x = 18,110.10 × 7,155
  4. Step 4: Simplify right side
    13,123.44x = 129,577,765.50
  5. Step 5: Solve for x
    x = 129,577,765.50/13,123.44
  6. Step 6: Final answer
    x = 9,873.77

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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.