Home / 10,928.96-15,078.40-6,451.20

Finding the Fourth Proportional to 10,928.96, 15,078.40 and 6,451.20

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Solution

The fourth proportional to 10,928.96, 15,078.40 and 6,451.20 is: 8,900.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,928.96 : 15,078.40 = 6,451.20 : x
  2. Step 2: Convert to fraction form
    10,928.96/15,078.40 = 6,451.20/x
  3. Step 3: Cross multiply
    10,928.96x = 15,078.40 × 6,451.20
  4. Step 4: Simplify right side
    10,928.96x = 97,273,774.08
  5. Step 5: Solve for x
    x = 97,273,774.08/10,928.96
  6. Step 6: Final answer
    x = 8,900.55

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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.