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Finding the Fourth Proportional to 7,840.79, 10,819.95 and 4,304.06

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Solution

The fourth proportional to 7,840.79, 10,819.95 and 4,304.06 is: 5,939.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,840.79 : 10,819.95 = 4,304.06 : x
  2. Step 2: Convert to fraction form
    7,840.79/10,819.95 = 4,304.06/x
  3. Step 3: Cross multiply
    7,840.79x = 10,819.95 × 4,304.06
  4. Step 4: Simplify right side
    7,840.79x = 46,569,714.00
  5. Step 5: Solve for x
    x = 46,569,714.00/7,840.79
  6. Step 6: Final answer
    x = 5,939.42

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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.