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Finding the Fourth Proportional to 36,795.90, 55,218.15 and 21,000.90

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Solution

The fourth proportional to 36,795.90, 55,218.15 and 21,000.90 is: 31,515.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,795.90 : 55,218.15 = 21,000.90 : x
  2. Step 2: Convert to fraction form
    36,795.90/55,218.15 = 21,000.90/x
  3. Step 3: Cross multiply
    36,795.90x = 55,218.15 × 21,000.90
  4. Step 4: Simplify right side
    36,795.90x = 1,159,630,846.34
  5. Step 5: Solve for x
    x = 1,159,630,846.34/36,795.90
  6. Step 6: Final answer
    x = 31,515.22

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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.