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Finding the Fourth Proportional to 7,818.51, 10,791.22 and 4,985.23

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Solution

The fourth proportional to 7,818.51, 10,791.22 and 4,985.23 is: 6,880.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,818.51 : 10,791.22 = 4,985.23 : x
  2. Step 2: Convert to fraction form
    7,818.51/10,791.22 = 4,985.23/x
  3. Step 3: Cross multiply
    7,818.51x = 10,791.22 × 4,985.23
  4. Step 4: Simplify right side
    7,818.51x = 53,796,688.75
  5. Step 5: Solve for x
    x = 53,796,688.75/7,818.51
  6. Step 6: Final answer
    x = 6,880.68

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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.