Home / 7,881.68-10,872.14-5,087.18

Finding the Fourth Proportional to 7,881.68, 10,872.14 and 5,087.18

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Solution

The fourth proportional to 7,881.68, 10,872.14 and 5,087.18 is: 7,017.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.68 : 10,872.14 = 5,087.18 : x
  2. Step 2: Convert to fraction form
    7,881.68/10,872.14 = 5,087.18/x
  3. Step 3: Cross multiply
    7,881.68x = 10,872.14 × 5,087.18
  4. Step 4: Simplify right side
    7,881.68x = 55,308,533.17
  5. Step 5: Solve for x
    x = 55,308,533.17/7,881.68
  6. Step 6: Final answer
    x = 7,017.35

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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.