Home / 11,143.07-15,349.55-8,485.86

Finding the Fourth Proportional to 11,143.07, 15,349.55 and 8,485.86

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Solution

The fourth proportional to 11,143.07, 15,349.55 and 8,485.86 is: 11,689.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,143.07 : 15,349.55 = 8,485.86 : x
  2. Step 2: Convert to fraction form
    11,143.07/15,349.55 = 8,485.86/x
  3. Step 3: Cross multiply
    11,143.07x = 15,349.55 × 8,485.86
  4. Step 4: Simplify right side
    11,143.07x = 130,254,195.23
  5. Step 5: Solve for x
    x = 130,254,195.23/11,143.07
  6. Step 6: Final answer
    x = 11,689.26

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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.