Home / 22,815.36-31,485.72-12,743.76

Finding the Fourth Proportional to 22,815.36, 31,485.72 and 12,743.76

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Solution

The fourth proportional to 22,815.36, 31,485.72 and 12,743.76 is: 17,586.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,815.36 : 31,485.72 = 12,743.76 : x
  2. Step 2: Convert to fraction form
    22,815.36/31,485.72 = 12,743.76/x
  3. Step 3: Cross multiply
    22,815.36x = 31,485.72 × 12,743.76
  4. Step 4: Simplify right side
    22,815.36x = 401,246,459.11
  5. Step 5: Solve for x
    x = 401,246,459.11/22,815.36
  6. Step 6: Final answer
    x = 17,586.68

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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.