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Finding the Fourth Proportional to 7,842.71, 10,820.82 and 4,653.35

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Solution

The fourth proportional to 7,842.71, 10,820.82 and 4,653.35 is: 6,420.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,842.71 : 10,820.82 = 4,653.35 : x
  2. Step 2: Convert to fraction form
    7,842.71/10,820.82 = 4,653.35/x
  3. Step 3: Cross multiply
    7,842.71x = 10,820.82 × 4,653.35
  4. Step 4: Simplify right side
    7,842.71x = 50,353,008.64
  5. Step 5: Solve for x
    x = 50,353,008.64/7,842.71
  6. Step 6: Final answer
    x = 6,420.36

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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.