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Finding the Fourth Proportional to 5,315.16, 7,960.38 and 5,130.60

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Solution

The fourth proportional to 5,315.16, 7,960.38 and 5,130.60 is: 7,683.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,315.16 : 7,960.38 = 5,130.60 : x
  2. Step 2: Convert to fraction form
    5,315.16/7,960.38 = 5,130.60/x
  3. Step 3: Cross multiply
    5,315.16x = 7,960.38 × 5,130.60
  4. Step 4: Simplify right side
    5,315.16x = 40,841,525.63
  5. Step 5: Solve for x
    x = 40,841,525.63/5,315.16
  6. Step 6: Final answer
    x = 7,683.97

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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.