Home / 11,139.90-16,709.85-9,930.30

Finding the Fourth Proportional to 11,139.90, 16,709.85 and 9,930.30

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Solution

The fourth proportional to 11,139.90, 16,709.85 and 9,930.30 is: 14,895.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.90 : 16,709.85 = 9,930.30 : x
  2. Step 2: Convert to fraction form
    11,139.90/16,709.85 = 9,930.30/x
  3. Step 3: Cross multiply
    11,139.90x = 16,709.85 × 9,930.30
  4. Step 4: Simplify right side
    11,139.90x = 165,933,823.46
  5. Step 5: Solve for x
    x = 165,933,823.46/11,139.90
  6. Step 6: Final answer
    x = 14,895.45

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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.