Home / 5,420.13-8,130.19-1,316.13

Finding the Fourth Proportional to 5,420.13, 8,130.19 and 1,316.13

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Solution

The fourth proportional to 5,420.13, 8,130.19 and 1,316.13 is: 1,974.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.13 : 8,130.19 = 1,316.13 : x
  2. Step 2: Convert to fraction form
    5,420.13/8,130.19 = 1,316.13/x
  3. Step 3: Cross multiply
    5,420.13x = 8,130.19 × 1,316.13
  4. Step 4: Simplify right side
    5,420.13x = 10,700,386.96
  5. Step 5: Solve for x
    x = 10,700,386.96/5,420.13
  6. Step 6: Final answer
    x = 1,974.19

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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.