Home / 11,011.60-15,202.92-7,878.16

Finding the Fourth Proportional to 11,011.60, 15,202.92 and 7,878.16

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Solution

The fourth proportional to 11,011.60, 15,202.92 and 7,878.16 is: 10,876.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,011.60 : 15,202.92 = 7,878.16 : x
  2. Step 2: Convert to fraction form
    11,011.60/15,202.92 = 7,878.16/x
  3. Step 3: Cross multiply
    11,011.60x = 15,202.92 × 7,878.16
  4. Step 4: Simplify right side
    11,011.60x = 119,771,036.23
  5. Step 5: Solve for x
    x = 119,771,036.23/11,011.60
  6. Step 6: Final answer
    x = 10,876.81

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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.