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Finding the Fourth Proportional to 21,752.63, 32,636.70 and 13,422.94

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Solution

The fourth proportional to 21,752.63, 32,636.70 and 13,422.94 is: 20,139.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,752.63 : 32,636.70 = 13,422.94 : x
  2. Step 2: Convert to fraction form
    21,752.63/32,636.70 = 13,422.94/x
  3. Step 3: Cross multiply
    21,752.63x = 32,636.70 × 13,422.94
  4. Step 4: Simplify right side
    21,752.63x = 438,080,438.34
  5. Step 5: Solve for x
    x = 438,080,438.34/21,752.63
  6. Step 6: Final answer
    x = 20,139.20

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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.