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Finding the Fourth Proportional to 18,953.95, 26,167.16 and 12,591.45

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Solution

The fourth proportional to 18,953.95, 26,167.16 and 12,591.45 is: 17,383.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,953.95 : 26,167.16 = 12,591.45 : x
  2. Step 2: Convert to fraction form
    18,953.95/26,167.16 = 12,591.45/x
  3. Step 3: Cross multiply
    18,953.95x = 26,167.16 × 12,591.45
  4. Step 4: Simplify right side
    18,953.95x = 329,482,486.78
  5. Step 5: Solve for x
    x = 329,482,486.78/18,953.95
  6. Step 6: Final answer
    x = 17,383.32

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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.