Home / 10,305.60-15,458.40-5,121.60

Finding the Fourth Proportional to 10,305.60, 15,458.40 and 5,121.60

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Solution

The fourth proportional to 10,305.60, 15,458.40 and 5,121.60 is: 7,682.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,305.60 : 15,458.40 = 5,121.60 : x
  2. Step 2: Convert to fraction form
    10,305.60/15,458.40 = 5,121.60/x
  3. Step 3: Cross multiply
    10,305.60x = 15,458.40 × 5,121.60
  4. Step 4: Simplify right side
    10,305.60x = 79,171,741.44
  5. Step 5: Solve for x
    x = 79,171,741.44/10,305.60
  6. Step 6: Final answer
    x = 7,682.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.