Home / 11,585.72-15,985.62-7,815.88

Finding the Fourth Proportional to 11,585.72, 15,985.62 and 7,815.88

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Solution

The fourth proportional to 11,585.72, 15,985.62 and 7,815.88 is: 10,784.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,585.72 : 15,985.62 = 7,815.88 : x
  2. Step 2: Convert to fraction form
    11,585.72/15,985.62 = 7,815.88/x
  3. Step 3: Cross multiply
    11,585.72x = 15,985.62 × 7,815.88
  4. Step 4: Simplify right side
    11,585.72x = 124,941,687.65
  5. Step 5: Solve for x
    x = 124,941,687.65/11,585.72
  6. Step 6: Final answer
    x = 10,784.11

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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.