Home / 10,071.99-15,109.53-5,138.94

Finding the Fourth Proportional to 10,071.99, 15,109.53 and 5,138.94

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Solution

The fourth proportional to 10,071.99, 15,109.53 and 5,138.94 is: 7,709.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,071.99 : 15,109.53 = 5,138.94 : x
  2. Step 2: Convert to fraction form
    10,071.99/15,109.53 = 5,138.94/x
  3. Step 3: Cross multiply
    10,071.99x = 15,109.53 × 5,138.94
  4. Step 4: Simplify right side
    10,071.99x = 77,646,968.10
  5. Step 5: Solve for x
    x = 77,646,968.10/10,071.99
  6. Step 6: Final answer
    x = 7,709.20

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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.