Home / 11,065.72-15,285.60-10,278.40

Finding the Fourth Proportional to 11,065.72, 15,285.60 and 10,278.40

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Solution

The fourth proportional to 11,065.72, 15,285.60 and 10,278.40 is: 14,198.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,065.72 : 15,285.60 = 10,278.40 : x
  2. Step 2: Convert to fraction form
    11,065.72/15,285.60 = 10,278.40/x
  3. Step 3: Cross multiply
    11,065.72x = 15,285.60 × 10,278.40
  4. Step 4: Simplify right side
    11,065.72x = 157,111,511.04
  5. Step 5: Solve for x
    x = 157,111,511.04/11,065.72
  6. Step 6: Final answer
    x = 14,198.04

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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.