Home / 7,815.64-11,723.04-1,971.91

Finding the Fourth Proportional to 7,815.64, 11,723.04 and 1,971.91

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Solution

The fourth proportional to 7,815.64, 11,723.04 and 1,971.91 is: 2,957.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.64 : 11,723.04 = 1,971.91 : x
  2. Step 2: Convert to fraction form
    7,815.64/11,723.04 = 1,971.91/x
  3. Step 3: Cross multiply
    7,815.64x = 11,723.04 × 1,971.91
  4. Step 4: Simplify right side
    7,815.64x = 23,116,779.81
  5. Step 5: Solve for x
    x = 23,116,779.81/7,815.64
  6. Step 6: Final answer
    x = 2,957.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.