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Finding the Fourth Proportional to 7,842.02, 10,821.45 and 4,305.47

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Solution

The fourth proportional to 7,842.02, 10,821.45 and 4,305.47 is: 5,941.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,842.02 : 10,821.45 = 4,305.47 : x
  2. Step 2: Convert to fraction form
    7,842.02/10,821.45 = 4,305.47/x
  3. Step 3: Cross multiply
    7,842.02x = 10,821.45 × 4,305.47
  4. Step 4: Simplify right side
    7,842.02x = 46,591,374.22
  5. Step 5: Solve for x
    x = 46,591,374.22/7,842.02
  6. Step 6: Final answer
    x = 5,941.24

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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.