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Finding the Fourth Proportional to 19,636.60, 27,089.88 and 12,913.60

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Solution

The fourth proportional to 19,636.60, 27,089.88 and 12,913.60 is: 17,815.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,636.60 : 27,089.88 = 12,913.60 : x
  2. Step 2: Convert to fraction form
    19,636.60/27,089.88 = 12,913.60/x
  3. Step 3: Cross multiply
    19,636.60x = 27,089.88 × 12,913.60
  4. Step 4: Simplify right side
    19,636.60x = 349,827,874.37
  5. Step 5: Solve for x
    x = 349,827,874.37/19,636.60
  6. Step 6: Final answer
    x = 17,815.09

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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.