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Finding the Fourth Proportional to 21,679.40, 32,520.04 and 7,457.68

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Solution

The fourth proportional to 21,679.40, 32,520.04 and 7,457.68 is: 11,186.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,679.40 : 32,520.04 = 7,457.68 : x
  2. Step 2: Convert to fraction form
    21,679.40/32,520.04 = 7,457.68/x
  3. Step 3: Cross multiply
    21,679.40x = 32,520.04 × 7,457.68
  4. Step 4: Simplify right side
    21,679.40x = 242,524,051.91
  5. Step 5: Solve for x
    x = 242,524,051.91/21,679.40
  6. Step 6: Final answer
    x = 11,186.84

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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.