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Finding the Fourth Proportional to 6,140.07, 8,478.07 and 4,721.56

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Solution

The fourth proportional to 6,140.07, 8,478.07 and 4,721.56 is: 6,519.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,140.07 : 8,478.07 = 4,721.56 : x
  2. Step 2: Convert to fraction form
    6,140.07/8,478.07 = 4,721.56/x
  3. Step 3: Cross multiply
    6,140.07x = 8,478.07 × 4,721.56
  4. Step 4: Simplify right side
    6,140.07x = 40,029,683.19
  5. Step 5: Solve for x
    x = 40,029,683.19/6,140.07
  6. Step 6: Final answer
    x = 6,519.42

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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.