Home / 20,748.56-31,111.80-8,262.16

Finding the Fourth Proportional to 20,748.56, 31,111.80 and 8,262.16

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Solution

The fourth proportional to 20,748.56, 31,111.80 and 8,262.16 is: 12,388.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,748.56 : 31,111.80 = 8,262.16 : x
  2. Step 2: Convert to fraction form
    20,748.56/31,111.80 = 8,262.16/x
  3. Step 3: Cross multiply
    20,748.56x = 31,111.80 × 8,262.16
  4. Step 4: Simplify right side
    20,748.56x = 257,050,669.49
  5. Step 5: Solve for x
    x = 257,050,669.49/20,748.56
  6. Step 6: Final answer
    x = 12,388.84

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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.