Home / 11,289.70-15,609.50-9,888.42

Finding the Fourth Proportional to 11,289.70, 15,609.50 and 9,888.42

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Solution

The fourth proportional to 11,289.70, 15,609.50 and 9,888.42 is: 13,672.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,289.70 : 15,609.50 = 9,888.42 : x
  2. Step 2: Convert to fraction form
    11,289.70/15,609.50 = 9,888.42/x
  3. Step 3: Cross multiply
    11,289.70x = 15,609.50 × 9,888.42
  4. Step 4: Simplify right side
    11,289.70x = 154,353,291.99
  5. Step 5: Solve for x
    x = 154,353,291.99/11,289.70
  6. Step 6: Final answer
    x = 13,672.05

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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.