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Finding the Fourth Proportional to 20,937.84, 28,893.12 and 11,504.58

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Solution

The fourth proportional to 20,937.84, 28,893.12 and 11,504.58 is: 15,875.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.84 : 28,893.12 = 11,504.58 : x
  2. Step 2: Convert to fraction form
    20,937.84/28,893.12 = 11,504.58/x
  3. Step 3: Cross multiply
    20,937.84x = 28,893.12 × 11,504.58
  4. Step 4: Simplify right side
    20,937.84x = 332,403,210.49
  5. Step 5: Solve for x
    x = 332,403,210.49/20,937.84
  6. Step 6: Final answer
    x = 15,875.72

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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.