Home / 13,680.34-18,878.61-7,712.01

Finding the Fourth Proportional to 13,680.34, 18,878.61 and 7,712.01

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Solution

The fourth proportional to 13,680.34, 18,878.61 and 7,712.01 is: 10,642.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.34 : 18,878.61 = 7,712.01 : x
  2. Step 2: Convert to fraction form
    13,680.34/18,878.61 = 7,712.01/x
  3. Step 3: Cross multiply
    13,680.34x = 18,878.61 × 7,712.01
  4. Step 4: Simplify right side
    13,680.34x = 145,592,052.60
  5. Step 5: Solve for x
    x = 145,592,052.60/13,680.34
  6. Step 6: Final answer
    x = 10,642.43

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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.