Home / 19,760.40-29,636.64-12,729.12

Finding the Fourth Proportional to 19,760.40, 29,636.64 and 12,729.12

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Solution

The fourth proportional to 19,760.40, 29,636.64 and 12,729.12 is: 19,091.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,760.40 : 29,636.64 = 12,729.12 : x
  2. Step 2: Convert to fraction form
    19,760.40/29,636.64 = 12,729.12/x
  3. Step 3: Cross multiply
    19,760.40x = 29,636.64 × 12,729.12
  4. Step 4: Simplify right side
    19,760.40x = 377,248,346.96
  5. Step 5: Solve for x
    x = 377,248,346.96/19,760.40
  6. Step 6: Final answer
    x = 19,091.13

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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.