Home / 9,985.20-13,780.26-5,736.96

Finding the Fourth Proportional to 9,985.20, 13,780.26 and 5,736.96

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Solution

The fourth proportional to 9,985.20, 13,780.26 and 5,736.96 is: 7,917.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,985.20 : 13,780.26 = 5,736.96 : x
  2. Step 2: Convert to fraction form
    9,985.20/13,780.26 = 5,736.96/x
  3. Step 3: Cross multiply
    9,985.20x = 13,780.26 × 5,736.96
  4. Step 4: Simplify right side
    9,985.20x = 79,056,800.41
  5. Step 5: Solve for x
    x = 79,056,800.41/9,985.20
  6. Step 6: Final answer
    x = 7,917.40

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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.