Home / 9,820.78-13,561.60-6,290.12

Finding the Fourth Proportional to 9,820.78, 13,561.60 and 6,290.12

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Solution

The fourth proportional to 9,820.78, 13,561.60 and 6,290.12 is: 8,686.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,820.78 : 13,561.60 = 6,290.12 : x
  2. Step 2: Convert to fraction form
    9,820.78/13,561.60 = 6,290.12/x
  3. Step 3: Cross multiply
    9,820.78x = 13,561.60 × 6,290.12
  4. Step 4: Simplify right side
    9,820.78x = 85,304,091.39
  5. Step 5: Solve for x
    x = 85,304,091.39/9,820.78
  6. Step 6: Final answer
    x = 8,686.08

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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.