Home / 8,451.36-12,657.60-6,980.40

Finding the Fourth Proportional to 8,451.36, 12,657.60 and 6,980.40

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Solution

The fourth proportional to 8,451.36, 12,657.60 and 6,980.40 is: 10,454.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,451.36 : 12,657.60 = 6,980.40 : x
  2. Step 2: Convert to fraction form
    8,451.36/12,657.60 = 6,980.40/x
  3. Step 3: Cross multiply
    8,451.36x = 12,657.60 × 6,980.40
  4. Step 4: Simplify right side
    8,451.36x = 88,355,111.04
  5. Step 5: Solve for x
    x = 88,355,111.04/8,451.36
  6. Step 6: Final answer
    x = 10,454.54

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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.