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Finding the Fourth Proportional to 31,392.34, 43,303.32 and 18,809.80

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Solution

The fourth proportional to 31,392.34, 43,303.32 and 18,809.80 is: 25,946.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,392.34 : 43,303.32 = 18,809.80 : x
  2. Step 2: Convert to fraction form
    31,392.34/43,303.32 = 18,809.80/x
  3. Step 3: Cross multiply
    31,392.34x = 43,303.32 × 18,809.80
  4. Step 4: Simplify right side
    31,392.34x = 814,526,788.54
  5. Step 5: Solve for x
    x = 814,526,788.54/31,392.34
  6. Step 6: Final answer
    x = 25,946.67

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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.