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Finding the Fourth Proportional to 7,878.19, 10,871.93 and 4,341.40

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Solution

The fourth proportional to 7,878.19, 10,871.93 and 4,341.40 is: 5,991.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.19 : 10,871.93 = 4,341.40 : x
  2. Step 2: Convert to fraction form
    7,878.19/10,871.93 = 4,341.40/x
  3. Step 3: Cross multiply
    7,878.19x = 10,871.93 × 4,341.40
  4. Step 4: Simplify right side
    7,878.19x = 47,199,380.58
  5. Step 5: Solve for x
    x = 47,199,380.58/7,878.19
  6. Step 6: Final answer
    x = 5,991.15

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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.