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Finding the Fourth Proportional to 5,156.50, 7,117.03 and 2,918.50

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Solution

The fourth proportional to 5,156.50, 7,117.03 and 2,918.50 is: 4,028.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.50 : 7,117.03 = 2,918.50 : x
  2. Step 2: Convert to fraction form
    5,156.50/7,117.03 = 2,918.50/x
  3. Step 3: Cross multiply
    5,156.50x = 7,117.03 × 2,918.50
  4. Step 4: Simplify right side
    5,156.50x = 20,771,052.06
  5. Step 5: Solve for x
    x = 20,771,052.06/5,156.50
  6. Step 6: Final answer
    x = 4,028.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.