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Finding the Fourth Proportional to 8,335.79, 11,495.93 and 6,917.21

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Solution

The fourth proportional to 8,335.79, 11,495.93 and 6,917.21 is: 9,539.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,335.79 : 11,495.93 = 6,917.21 : x
  2. Step 2: Convert to fraction form
    8,335.79/11,495.93 = 6,917.21/x
  3. Step 3: Cross multiply
    8,335.79x = 11,495.93 × 6,917.21
  4. Step 4: Simplify right side
    8,335.79x = 79,519,669.89
  5. Step 5: Solve for x
    x = 79,519,669.89/8,335.79
  6. Step 6: Final answer
    x = 9,539.55

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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.