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Finding the Fourth Proportional to 5,420.48, 8,130.72 and 1,957.72

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Solution

The fourth proportional to 5,420.48, 8,130.72 and 1,957.72 is: 2,936.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.48 : 8,130.72 = 1,957.72 : x
  2. Step 2: Convert to fraction form
    5,420.48/8,130.72 = 1,957.72/x
  3. Step 3: Cross multiply
    5,420.48x = 8,130.72 × 1,957.72
  4. Step 4: Simplify right side
    5,420.48x = 15,917,673.16
  5. Step 5: Solve for x
    x = 15,917,673.16/5,420.48
  6. Step 6: Final answer
    x = 2,936.58

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Similar ratio
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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.