Home / 11,155.92-15,395.85-6,440.51

Finding the Fourth Proportional to 11,155.92, 15,395.85 and 6,440.51

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Solution

The fourth proportional to 11,155.92, 15,395.85 and 6,440.51 is: 8,888.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,155.92 : 15,395.85 = 6,440.51 : x
  2. Step 2: Convert to fraction form
    11,155.92/15,395.85 = 6,440.51/x
  3. Step 3: Cross multiply
    11,155.92x = 15,395.85 × 6,440.51
  4. Step 4: Simplify right side
    11,155.92x = 99,157,048.90
  5. Step 5: Solve for x
    x = 99,157,048.90/11,155.92
  6. Step 6: Final answer
    x = 8,888.29

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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.