Home / 11,245.78-15,516.32-6,400.50

Finding the Fourth Proportional to 11,245.78, 15,516.32 and 6,400.50

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Solution

The fourth proportional to 11,245.78, 15,516.32 and 6,400.50 is: 8,831.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,245.78 : 15,516.32 = 6,400.50 : x
  2. Step 2: Convert to fraction form
    11,245.78/15,516.32 = 6,400.50/x
  3. Step 3: Cross multiply
    11,245.78x = 15,516.32 × 6,400.50
  4. Step 4: Simplify right side
    11,245.78x = 99,312,206.16
  5. Step 5: Solve for x
    x = 99,312,206.16/11,245.78
  6. Step 6: Final answer
    x = 8,831.06

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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.