Home / 11,238.81-15,509.46-6,459

Finding the Fourth Proportional to 11,238.81, 15,509.46 and 6,459

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Solution

The fourth proportional to 11,238.81, 15,509.46 and 6,459 is: 8,913.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,238.81 : 15,509.46 = 6,459 : x
  2. Step 2: Convert to fraction form
    11,238.81/15,509.46 = 6,459/x
  3. Step 3: Cross multiply
    11,238.81x = 15,509.46 × 6,459
  4. Step 4: Simplify right side
    11,238.81x = 100,175,602.14
  5. Step 5: Solve for x
    x = 100,175,602.14/11,238.81
  6. Step 6: Final answer
    x = 8,913.36

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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.