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Finding the Fourth Proportional to 18,903.30, 26,053.59 and 13,856.79

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Solution

The fourth proportional to 18,903.30, 26,053.59 and 13,856.79 is: 19,098.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.30 : 26,053.59 = 13,856.79 : x
  2. Step 2: Convert to fraction form
    18,903.30/26,053.59 = 13,856.79/x
  3. Step 3: Cross multiply
    18,903.30x = 26,053.59 × 13,856.79
  4. Step 4: Simplify right side
    18,903.30x = 361,019,125.38
  5. Step 5: Solve for x
    x = 361,019,125.38/18,903.30
  6. Step 6: Final answer
    x = 19,098.21

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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.