Home / 21,276.72-31,904.40-12,394.92

Finding the Fourth Proportional to 21,276.72, 31,904.40 and 12,394.92

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Solution

The fourth proportional to 21,276.72, 31,904.40 and 12,394.92 is: 18,586.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,276.72 : 31,904.40 = 12,394.92 : x
  2. Step 2: Convert to fraction form
    21,276.72/31,904.40 = 12,394.92/x
  3. Step 3: Cross multiply
    21,276.72x = 31,904.40 × 12,394.92
  4. Step 4: Simplify right side
    21,276.72x = 395,452,485.65
  5. Step 5: Solve for x
    x = 395,452,485.65/21,276.72
  6. Step 6: Final answer
    x = 18,586.16

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1.5x scale

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.