Home / 13,123.40-18,110.32-7,818.30

Finding the Fourth Proportional to 13,123.40, 18,110.32 and 7,818.30

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Solution

The fourth proportional to 13,123.40, 18,110.32 and 7,818.30 is: 10,789.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,123.40 : 18,110.32 = 7,818.30 : x
  2. Step 2: Convert to fraction form
    13,123.40/18,110.32 = 7,818.30/x
  3. Step 3: Cross multiply
    13,123.40x = 18,110.32 × 7,818.30
  4. Step 4: Simplify right side
    13,123.40x = 141,591,914.86
  5. Step 5: Solve for x
    x = 141,591,914.86/13,123.40
  6. Step 6: Final answer
    x = 10,789.27

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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.