Home / 12,815.44-17,685.96-9,666.16

Finding the Fourth Proportional to 12,815.44, 17,685.96 and 9,666.16

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Solution

The fourth proportional to 12,815.44, 17,685.96 and 9,666.16 is: 13,339.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.44 : 17,685.96 = 9,666.16 : x
  2. Step 2: Convert to fraction form
    12,815.44/17,685.96 = 9,666.16/x
  3. Step 3: Cross multiply
    12,815.44x = 17,685.96 × 9,666.16
  4. Step 4: Simplify right side
    12,815.44x = 170,955,319.11
  5. Step 5: Solve for x
    x = 170,955,319.11/12,815.44
  6. Step 6: Final answer
    x = 13,339.79

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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.