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Finding the Fourth Proportional to 21,596.63, 29,803.65 and 13,213.13

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Solution

The fourth proportional to 21,596.63, 29,803.65 and 13,213.13 is: 18,234.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,596.63 : 29,803.65 = 13,213.13 : x
  2. Step 2: Convert to fraction form
    21,596.63/29,803.65 = 13,213.13/x
  3. Step 3: Cross multiply
    21,596.63x = 29,803.65 × 13,213.13
  4. Step 4: Simplify right side
    21,596.63x = 393,799,303.36
  5. Step 5: Solve for x
    x = 393,799,303.36/21,596.63
  6. Step 6: Final answer
    x = 18,234.30

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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.