Home / 5,130.79-7,079.50-3,141.99

Finding the Fourth Proportional to 5,130.79, 7,079.50 and 3,141.99

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Solution

The fourth proportional to 5,130.79, 7,079.50 and 3,141.99 is: 4,335.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,130.79 : 7,079.50 = 3,141.99 : x
  2. Step 2: Convert to fraction form
    5,130.79/7,079.50 = 3,141.99/x
  3. Step 3: Cross multiply
    5,130.79x = 7,079.50 × 3,141.99
  4. Step 4: Simplify right side
    5,130.79x = 22,243,722.13
  5. Step 5: Solve for x
    x = 22,243,722.13/5,130.79
  6. Step 6: Final answer
    x = 4,335.34

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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.