Home / 11,128.45-15,358.89-6,411.81

Finding the Fourth Proportional to 11,128.45, 15,358.89 and 6,411.81

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Solution

The fourth proportional to 11,128.45, 15,358.89 and 6,411.81 is: 8,849.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,128.45 : 15,358.89 = 6,411.81 : x
  2. Step 2: Convert to fraction form
    11,128.45/15,358.89 = 6,411.81/x
  3. Step 3: Cross multiply
    11,128.45x = 15,358.89 × 6,411.81
  4. Step 4: Simplify right side
    11,128.45x = 98,478,284.49
  5. Step 5: Solve for x
    x = 98,478,284.49/11,128.45
  6. Step 6: Final answer
    x = 8,849.24

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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.