Home / 3,127.40-4,315.74-1,730.15

Finding the Fourth Proportional to 3,127.40, 4,315.74 and 1,730.15

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Solution

The fourth proportional to 3,127.40, 4,315.74 and 1,730.15 is: 2,387.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.40 : 4,315.74 = 1,730.15 : x
  2. Step 2: Convert to fraction form
    3,127.40/4,315.74 = 1,730.15/x
  3. Step 3: Cross multiply
    3,127.40x = 4,315.74 × 1,730.15
  4. Step 4: Simplify right side
    3,127.40x = 7,466,877.56
  5. Step 5: Solve for x
    x = 7,466,877.56/3,127.40
  6. Step 6: Final answer
    x = 2,387.57

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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.