Home / 12,428-17,150.64-6,839.36

Finding the Fourth Proportional to 12,428, 17,150.64 and 6,839.36

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Solution

The fourth proportional to 12,428, 17,150.64 and 6,839.36 is: 9,438.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428 : 17,150.64 = 6,839.36 : x
  2. Step 2: Convert to fraction form
    12,428/17,150.64 = 6,839.36/x
  3. Step 3: Cross multiply
    12,428x = 17,150.64 × 6,839.36
  4. Step 4: Simplify right side
    12,428x = 117,299,401.19
  5. Step 5: Solve for x
    x = 117,299,401.19/12,428
  6. Step 6: Final answer
    x = 9,438.32

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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.