Home / 10,542.13-15,815.79-7,428.22

Finding the Fourth Proportional to 10,542.13, 15,815.79 and 7,428.22

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Solution

The fourth proportional to 10,542.13, 15,815.79 and 7,428.22 is: 11,144.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,542.13 : 15,815.79 = 7,428.22 : x
  2. Step 2: Convert to fraction form
    10,542.13/15,815.79 = 7,428.22/x
  3. Step 3: Cross multiply
    10,542.13x = 15,815.79 × 7,428.22
  4. Step 4: Simplify right side
    10,542.13x = 117,483,181.63
  5. Step 5: Solve for x
    x = 117,483,181.63/10,542.13
  6. Step 6: Final answer
    x = 11,144.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.