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Finding the Fourth Proportional to 7,842.88, 10,822.76 and 4,699.36

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Solution

The fourth proportional to 7,842.88, 10,822.76 and 4,699.36 is: 6,484.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,842.88 : 10,822.76 = 4,699.36 : x
  2. Step 2: Convert to fraction form
    7,842.88/10,822.76 = 4,699.36/x
  3. Step 3: Cross multiply
    7,842.88x = 10,822.76 × 4,699.36
  4. Step 4: Simplify right side
    7,842.88x = 50,860,045.43
  5. Step 5: Solve for x
    x = 50,860,045.43/7,842.88
  6. Step 6: Final answer
    x = 6,484.87

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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.