Home / 20,911.06-31,394.40-12,152.26

Finding the Fourth Proportional to 20,911.06, 31,394.40 and 12,152.26

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Solution

The fourth proportional to 20,911.06, 31,394.40 and 12,152.26 is: 18,244.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.06 : 31,394.40 = 12,152.26 : x
  2. Step 2: Convert to fraction form
    20,911.06/31,394.40 = 12,152.26/x
  3. Step 3: Cross multiply
    20,911.06x = 31,394.40 × 12,152.26
  4. Step 4: Simplify right side
    20,911.06x = 381,512,911.34
  5. Step 5: Solve for x
    x = 381,512,911.34/20,911.06
  6. Step 6: Final answer
    x = 18,244.55

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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.