Home / 13,579.68-18,734.88-7,911.60

Finding the Fourth Proportional to 13,579.68, 18,734.88 and 7,911.60

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Solution

The fourth proportional to 13,579.68, 18,734.88 and 7,911.60 is: 10,915.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,579.68 : 18,734.88 = 7,911.60 : x
  2. Step 2: Convert to fraction form
    13,579.68/18,734.88 = 7,911.60/x
  3. Step 3: Cross multiply
    13,579.68x = 18,734.88 × 7,911.60
  4. Step 4: Simplify right side
    13,579.68x = 148,222,876.61
  5. Step 5: Solve for x
    x = 148,222,876.61/13,579.68
  6. Step 6: Final answer
    x = 10,915.05

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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.