Home / 3,139.02-4,337.55-2,987.19

Finding the Fourth Proportional to 3,139.02, 4,337.55 and 2,987.19

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Solution

The fourth proportional to 3,139.02, 4,337.55 and 2,987.19 is: 4,127.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.02 : 4,337.55 = 2,987.19 : x
  2. Step 2: Convert to fraction form
    3,139.02/4,337.55 = 2,987.19/x
  3. Step 3: Cross multiply
    3,139.02x = 4,337.55 × 2,987.19
  4. Step 4: Simplify right side
    3,139.02x = 12,957,085.98
  5. Step 5: Solve for x
    x = 12,957,085.98/3,139.02
  6. Step 6: Final answer
    x = 4,127.75

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Half scale
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Double scale
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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.