Home / 5,280.40-7,921.48-1,816.72

Finding the Fourth Proportional to 5,280.40, 7,921.48 and 1,816.72

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Solution

The fourth proportional to 5,280.40, 7,921.48 and 1,816.72 is: 2,725.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.40 : 7,921.48 = 1,816.72 : x
  2. Step 2: Convert to fraction form
    5,280.40/7,921.48 = 1,816.72/x
  3. Step 3: Cross multiply
    5,280.40x = 7,921.48 × 1,816.72
  4. Step 4: Simplify right side
    5,280.40x = 14,391,111.15
  5. Step 5: Solve for x
    x = 14,391,111.15/5,280.40
  6. Step 6: Final answer
    x = 2,725.38

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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.