Home / 10,917.95-16,390.76-9,091.40

Finding the Fourth Proportional to 10,917.95, 16,390.76 and 9,091.40

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Solution

The fourth proportional to 10,917.95, 16,390.76 and 9,091.40 is: 13,648.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,917.95 : 16,390.76 = 9,091.40 : x
  2. Step 2: Convert to fraction form
    10,917.95/16,390.76 = 9,091.40/x
  3. Step 3: Cross multiply
    10,917.95x = 16,390.76 × 9,091.40
  4. Step 4: Simplify right side
    10,917.95x = 149,014,828.05
  5. Step 5: Solve for x
    x = 149,014,828.05/10,917.95
  6. Step 6: Final answer
    x = 13,648.62

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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.