Home / 19,409.39-29,113.85-13,686.78

Finding the Fourth Proportional to 19,409.39, 29,113.85 and 13,686.78

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Solution

The fourth proportional to 19,409.39, 29,113.85 and 13,686.78 is: 20,530.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,409.39 : 29,113.85 = 13,686.78 : x
  2. Step 2: Convert to fraction form
    19,409.39/29,113.85 = 13,686.78/x
  3. Step 3: Cross multiply
    19,409.39x = 29,113.85 × 13,686.78
  4. Step 4: Simplify right side
    19,409.39x = 398,474,859.90
  5. Step 5: Solve for x
    x = 398,474,859.90/19,409.39
  6. Step 6: Final answer
    x = 20,530.00

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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.