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Finding the Fourth Proportional to 21,753.74, 32,623.72 and 13,421.28

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Solution

The fourth proportional to 21,753.74, 32,623.72 and 13,421.28 is: 20,127.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,753.74 : 32,623.72 = 13,421.28 : x
  2. Step 2: Convert to fraction form
    21,753.74/32,623.72 = 13,421.28/x
  3. Step 3: Cross multiply
    21,753.74x = 32,623.72 × 13,421.28
  4. Step 4: Simplify right side
    21,753.74x = 437,852,080.76
  5. Step 5: Solve for x
    x = 437,852,080.76/21,753.74
  6. Step 6: Final answer
    x = 20,127.67

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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.