Home / 5,280.40-7,918.16-2,814.72

Finding the Fourth Proportional to 5,280.40, 7,918.16 and 2,814.72

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Solution

The fourth proportional to 5,280.40, 7,918.16 and 2,814.72 is: 4,220.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.40 : 7,918.16 = 2,814.72 : x
  2. Step 2: Convert to fraction form
    5,280.40/7,918.16 = 2,814.72/x
  3. Step 3: Cross multiply
    5,280.40x = 7,918.16 × 2,814.72
  4. Step 4: Simplify right side
    5,280.40x = 22,287,403.32
  5. Step 5: Solve for x
    x = 22,287,403.32/5,280.40
  6. Step 6: Final answer
    x = 4,220.78

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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.