Home / 10,930.41-15,090.18-7,215.21

Finding the Fourth Proportional to 10,930.41, 15,090.18 and 7,215.21

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Solution

The fourth proportional to 10,930.41, 15,090.18 and 7,215.21 is: 9,961.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,930.41 : 15,090.18 = 7,215.21 : x
  2. Step 2: Convert to fraction form
    10,930.41/15,090.18 = 7,215.21/x
  3. Step 3: Cross multiply
    10,930.41x = 15,090.18 × 7,215.21
  4. Step 4: Simplify right side
    10,930.41x = 108,878,817.64
  5. Step 5: Solve for x
    x = 108,878,817.64/10,930.41
  6. Step 6: Final answer
    x = 9,961.09

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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.