Home / 5,125.60-7,688.40-2,784.70

Finding the Fourth Proportional to 5,125.60, 7,688.40 and 2,784.70

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Solution

The fourth proportional to 5,125.60, 7,688.40 and 2,784.70 is: 4,177.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,125.60 : 7,688.40 = 2,784.70 : x
  2. Step 2: Convert to fraction form
    5,125.60/7,688.40 = 2,784.70/x
  3. Step 3: Cross multiply
    5,125.60x = 7,688.40 × 2,784.70
  4. Step 4: Simplify right side
    5,125.60x = 21,409,887.48
  5. Step 5: Solve for x
    x = 21,409,887.48/5,125.60
  6. Step 6: Final answer
    x = 4,177.05

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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.