Home / 8,278.16-11,440.24-6,783.72

Finding the Fourth Proportional to 8,278.16, 11,440.24 and 6,783.72

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Solution

The fourth proportional to 8,278.16, 11,440.24 and 6,783.72 is: 9,374.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,278.16 : 11,440.24 = 6,783.72 : x
  2. Step 2: Convert to fraction form
    8,278.16/11,440.24 = 6,783.72/x
  3. Step 3: Cross multiply
    8,278.16x = 11,440.24 × 6,783.72
  4. Step 4: Simplify right side
    8,278.16x = 77,607,384.89
  5. Step 5: Solve for x
    x = 77,607,384.89/8,278.16
  6. Step 6: Final answer
    x = 9,374.96

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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.