Home / 5,420.25-8,130.38-1,316.25

Finding the Fourth Proportional to 5,420.25, 8,130.38 and 1,316.25

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Solution

The fourth proportional to 5,420.25, 8,130.38 and 1,316.25 is: 1,974.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.25 : 8,130.38 = 1,316.25 : x
  2. Step 2: Convert to fraction form
    5,420.25/8,130.38 = 1,316.25/x
  3. Step 3: Cross multiply
    5,420.25x = 8,130.38 × 1,316.25
  4. Step 4: Simplify right side
    5,420.25x = 10,701,606.09
  5. Step 5: Solve for x
    x = 10,701,606.09/5,420.25
  6. Step 6: Final answer
    x = 1,974.38

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Double scale
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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.