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Finding the Fourth Proportional to 18,856.99, 28,261.59 and 18,366.40

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Solution

The fourth proportional to 18,856.99, 28,261.59 and 18,366.40 is: 27,526.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,856.99 : 28,261.59 = 18,366.40 : x
  2. Step 2: Convert to fraction form
    18,856.99/28,261.59 = 18,366.40/x
  3. Step 3: Cross multiply
    18,856.99x = 28,261.59 × 18,366.40
  4. Step 4: Simplify right side
    18,856.99x = 519,063,666.58
  5. Step 5: Solve for x
    x = 519,063,666.58/18,856.99
  6. Step 6: Final answer
    x = 27,526.33

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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.