Home / 5,130.32-7,079.34-2,891.99

Finding the Fourth Proportional to 5,130.32, 7,079.34 and 2,891.99

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Solution

The fourth proportional to 5,130.32, 7,079.34 and 2,891.99 is: 3,990.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,130.32 : 7,079.34 = 2,891.99 : x
  2. Step 2: Convert to fraction form
    5,130.32/7,079.34 = 2,891.99/x
  3. Step 3: Cross multiply
    5,130.32x = 7,079.34 × 2,891.99
  4. Step 4: Simplify right side
    5,130.32x = 20,473,345.09
  5. Step 5: Solve for x
    x = 20,473,345.09/5,130.32
  6. Step 6: Final answer
    x = 3,990.66

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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.