Home / 2,987.06-4,130.32-2,520.70

Finding the Fourth Proportional to 2,987.06, 4,130.32 and 2,520.70

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Solution

The fourth proportional to 2,987.06, 4,130.32 and 2,520.70 is: 3,485.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.06 : 4,130.32 = 2,520.70 : x
  2. Step 2: Convert to fraction form
    2,987.06/4,130.32 = 2,520.70/x
  3. Step 3: Cross multiply
    2,987.06x = 4,130.32 × 2,520.70
  4. Step 4: Simplify right side
    2,987.06x = 10,411,297.62
  5. Step 5: Solve for x
    x = 10,411,297.62/2,987.06
  6. Step 6: Final answer
    x = 3,485.47

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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.