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Finding the Fourth Proportional to 20,655, 30,925.80 and 14,421.24

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Solution

The fourth proportional to 20,655, 30,925.80 and 14,421.24 is: 21,592.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655 : 30,925.80 = 14,421.24 : x
  2. Step 2: Convert to fraction form
    20,655/30,925.80 = 14,421.24/x
  3. Step 3: Cross multiply
    20,655x = 30,925.80 × 14,421.24
  4. Step 4: Simplify right side
    20,655x = 445,988,383.99
  5. Step 5: Solve for x
    x = 445,988,383.99/20,655
  6. Step 6: Final answer
    x = 21,592.27

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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.