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Finding the Fourth Proportional to 19,548.60, 29,322.90 and 12,987.60

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Solution

The fourth proportional to 19,548.60, 29,322.90 and 12,987.60 is: 19,481.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,548.60 : 29,322.90 = 12,987.60 : x
  2. Step 2: Convert to fraction form
    19,548.60/29,322.90 = 12,987.60/x
  3. Step 3: Cross multiply
    19,548.60x = 29,322.90 × 12,987.60
  4. Step 4: Simplify right side
    19,548.60x = 380,834,096.04
  5. Step 5: Solve for x
    x = 380,834,096.04/19,548.60
  6. Step 6: Final answer
    x = 19,481.40

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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.