Home / 18,966.10-28,438.35-13,123.30

Finding the Fourth Proportional to 18,966.10, 28,438.35 and 13,123.30

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Solution

The fourth proportional to 18,966.10, 28,438.35 and 13,123.30 is: 19,677.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,966.10 : 28,438.35 = 13,123.30 : x
  2. Step 2: Convert to fraction form
    18,966.10/28,438.35 = 13,123.30/x
  3. Step 3: Cross multiply
    18,966.10x = 28,438.35 × 13,123.30
  4. Step 4: Simplify right side
    18,966.10x = 373,204,998.56
  5. Step 5: Solve for x
    x = 373,204,998.56/18,966.10
  6. Step 6: Final answer
    x = 19,677.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.