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Finding the Fourth Proportional to 19,407.85, 26,799.64 and 18,411.40

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Solution

The fourth proportional to 19,407.85, 26,799.64 and 18,411.40 is: 25,423.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,407.85 : 26,799.64 = 18,411.40 : x
  2. Step 2: Convert to fraction form
    19,407.85/26,799.64 = 18,411.40/x
  3. Step 3: Cross multiply
    19,407.85x = 26,799.64 × 18,411.40
  4. Step 4: Simplify right side
    19,407.85x = 493,418,757.90
  5. Step 5: Solve for x
    x = 493,418,757.90/19,407.85
  6. Step 6: Final answer
    x = 25,423.68

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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.