Home / 3,148.20-4,347.28-1,971.28

Finding the Fourth Proportional to 3,148.20, 4,347.28 and 1,971.28

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Solution

The fourth proportional to 3,148.20, 4,347.28 and 1,971.28 is: 2,722.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,148.20 : 4,347.28 = 1,971.28 : x
  2. Step 2: Convert to fraction form
    3,148.20/4,347.28 = 1,971.28/x
  3. Step 3: Cross multiply
    3,148.20x = 4,347.28 × 1,971.28
  4. Step 4: Simplify right side
    3,148.20x = 8,569,706.12
  5. Step 5: Solve for x
    x = 8,569,706.12/3,148.20
  6. Step 6: Final answer
    x = 2,722.10

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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.