Home / 11,280.78-16,923.60-7,985.70

Finding the Fourth Proportional to 11,280.78, 16,923.60 and 7,985.70

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Solution

The fourth proportional to 11,280.78, 16,923.60 and 7,985.70 is: 11,980.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,280.78 : 16,923.60 = 7,985.70 : x
  2. Step 2: Convert to fraction form
    11,280.78/16,923.60 = 7,985.70/x
  3. Step 3: Cross multiply
    11,280.78x = 16,923.60 × 7,985.70
  4. Step 4: Simplify right side
    11,280.78x = 135,146,792.52
  5. Step 5: Solve for x
    x = 135,146,792.52/11,280.78
  6. Step 6: Final answer
    x = 11,980.27

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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.