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Finding the Fourth Proportional to 7,842.62, 10,821.33 and 5,326.74

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Solution

The fourth proportional to 7,842.62, 10,821.33 and 5,326.74 is: 7,349.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,842.62 : 10,821.33 = 5,326.74 : x
  2. Step 2: Convert to fraction form
    7,842.62/10,821.33 = 5,326.74/x
  3. Step 3: Cross multiply
    7,842.62x = 10,821.33 × 5,326.74
  4. Step 4: Simplify right side
    7,842.62x = 57,642,411.36
  5. Step 5: Solve for x
    x = 57,642,411.36/7,842.62
  6. Step 6: Final answer
    x = 7,349.89

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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.