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Finding the Fourth Proportional to 7,878.74, 10,872.68 and 4,293.68

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Solution

The fourth proportional to 7,878.74, 10,872.68 and 4,293.68 is: 5,925.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.74 : 10,872.68 = 4,293.68 : x
  2. Step 2: Convert to fraction form
    7,878.74/10,872.68 = 4,293.68/x
  3. Step 3: Cross multiply
    7,878.74x = 10,872.68 × 4,293.68
  4. Step 4: Simplify right side
    7,878.74x = 46,683,808.66
  5. Step 5: Solve for x
    x = 46,683,808.66/7,878.74
  6. Step 6: Final answer
    x = 5,925.29

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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.