Home / 9,815.40-13,562.10-8,065.80

Finding the Fourth Proportional to 9,815.40, 13,562.10 and 8,065.80

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Solution

The fourth proportional to 9,815.40, 13,562.10 and 8,065.80 is: 11,144.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,815.40 : 13,562.10 = 8,065.80 : x
  2. Step 2: Convert to fraction form
    9,815.40/13,562.10 = 8,065.80/x
  3. Step 3: Cross multiply
    9,815.40x = 13,562.10 × 8,065.80
  4. Step 4: Simplify right side
    9,815.40x = 109,389,186.18
  5. Step 5: Solve for x
    x = 109,389,186.18/9,815.40
  6. Step 6: Final answer
    x = 11,144.65

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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.