Home / 11,013.60-15,205.68-7,880.16

Finding the Fourth Proportional to 11,013.60, 15,205.68 and 7,880.16

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Solution

The fourth proportional to 11,013.60, 15,205.68 and 7,880.16 is: 10,879.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,013.60 : 15,205.68 = 7,880.16 : x
  2. Step 2: Convert to fraction form
    11,013.60/15,205.68 = 7,880.16/x
  3. Step 3: Cross multiply
    11,013.60x = 15,205.68 × 7,880.16
  4. Step 4: Simplify right side
    11,013.60x = 119,823,191.31
  5. Step 5: Solve for x
    x = 119,823,191.31/11,013.60
  6. Step 6: Final answer
    x = 10,879.57

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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.