Home / 8,275.02-11,417.90-5,129.78

Finding the Fourth Proportional to 8,275.02, 11,417.90 and 5,129.78

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Solution

The fourth proportional to 8,275.02, 11,417.90 and 5,129.78 is: 7,078.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,275.02 : 11,417.90 = 5,129.78 : x
  2. Step 2: Convert to fraction form
    8,275.02/11,417.90 = 5,129.78/x
  3. Step 3: Cross multiply
    8,275.02x = 11,417.90 × 5,129.78
  4. Step 4: Simplify right side
    8,275.02x = 58,571,315.06
  5. Step 5: Solve for x
    x = 58,571,315.06/8,275.02
  6. Step 6: Final answer
    x = 7,078.09

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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.