Home / 8,486.56-11,708.64-5,130.40

Finding the Fourth Proportional to 8,486.56, 11,708.64 and 5,130.40

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Solution

The fourth proportional to 8,486.56, 11,708.64 and 5,130.40 is: 7,078.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.56 : 11,708.64 = 5,130.40 : x
  2. Step 2: Convert to fraction form
    8,486.56/11,708.64 = 5,130.40/x
  3. Step 3: Cross multiply
    8,486.56x = 11,708.64 × 5,130.40
  4. Step 4: Simplify right side
    8,486.56x = 60,070,006.66
  5. Step 5: Solve for x
    x = 60,070,006.66/8,486.56
  6. Step 6: Final answer
    x = 7,078.25

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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.