Home / 9,321.72-12,862.80-5,130.24

Finding the Fourth Proportional to 9,321.72, 12,862.80 and 5,130.24

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Solution

The fourth proportional to 9,321.72, 12,862.80 and 5,130.24 is: 7,079.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,321.72 : 12,862.80 = 5,130.24 : x
  2. Step 2: Convert to fraction form
    9,321.72/12,862.80 = 5,130.24/x
  3. Step 3: Cross multiply
    9,321.72x = 12,862.80 × 5,130.24
  4. Step 4: Simplify right side
    9,321.72x = 65,989,251.07
  5. Step 5: Solve for x
    x = 65,989,251.07/9,321.72
  6. Step 6: Final answer
    x = 7,079.09

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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.