Home / 10,939.08-15,090.66-7,160.58

Finding the Fourth Proportional to 10,939.08, 15,090.66 and 7,160.58

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Solution

The fourth proportional to 10,939.08, 15,090.66 and 7,160.58 is: 9,878.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,939.08 : 15,090.66 = 7,160.58 : x
  2. Step 2: Convert to fraction form
    10,939.08/15,090.66 = 7,160.58/x
  3. Step 3: Cross multiply
    10,939.08x = 15,090.66 × 7,160.58
  4. Step 4: Simplify right side
    10,939.08x = 108,057,878.18
  5. Step 5: Solve for x
    x = 108,057,878.18/10,939.08
  6. Step 6: Final answer
    x = 9,878.15

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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.