Home / 5,278.15-7,918.81-1,580.50

Finding the Fourth Proportional to 5,278.15, 7,918.81 and 1,580.50

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Solution

The fourth proportional to 5,278.15, 7,918.81 and 1,580.50 is: 2,371.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.15 : 7,918.81 = 1,580.50 : x
  2. Step 2: Convert to fraction form
    5,278.15/7,918.81 = 1,580.50/x
  3. Step 3: Cross multiply
    5,278.15x = 7,918.81 × 1,580.50
  4. Step 4: Simplify right side
    5,278.15x = 12,515,679.21
  5. Step 5: Solve for x
    x = 12,515,679.21/5,278.15
  6. Step 6: Final answer
    x = 2,371.22

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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.