Home / 11,142.24-15,376.04-6,428

Finding the Fourth Proportional to 11,142.24, 15,376.04 and 6,428

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Solution

The fourth proportional to 11,142.24, 15,376.04 and 6,428 is: 8,870.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,142.24 : 15,376.04 = 6,428 : x
  2. Step 2: Convert to fraction form
    11,142.24/15,376.04 = 6,428/x
  3. Step 3: Cross multiply
    11,142.24x = 15,376.04 × 6,428
  4. Step 4: Simplify right side
    11,142.24x = 98,837,185.12
  5. Step 5: Solve for x
    x = 98,837,185.12/11,142.24
  6. Step 6: Final answer
    x = 8,870.50

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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.