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Finding the Fourth Proportional to 18,861.66, 26,019.99 and 12,565.98

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Solution

The fourth proportional to 18,861.66, 26,019.99 and 12,565.98 is: 17,334.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,861.66 : 26,019.99 = 12,565.98 : x
  2. Step 2: Convert to fraction form
    18,861.66/26,019.99 = 12,565.98/x
  3. Step 3: Cross multiply
    18,861.66x = 26,019.99 × 12,565.98
  4. Step 4: Simplify right side
    18,861.66x = 326,966,673.94
  5. Step 5: Solve for x
    x = 326,966,673.94/18,861.66
  6. Step 6: Final answer
    x = 17,334.99

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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.