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Finding the Fourth Proportional to 20,637.94, 28,482.08 and 12,682.94

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Solution

The fourth proportional to 20,637.94, 28,482.08 and 12,682.94 is: 17,503.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.94 : 28,482.08 = 12,682.94 : x
  2. Step 2: Convert to fraction form
    20,637.94/28,482.08 = 12,682.94/x
  3. Step 3: Cross multiply
    20,637.94x = 28,482.08 × 12,682.94
  4. Step 4: Simplify right side
    20,637.94x = 361,236,511.72
  5. Step 5: Solve for x
    x = 361,236,511.72/20,637.94
  6. Step 6: Final answer
    x = 17,503.52

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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.