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Finding the Fourth Proportional to 19,657.79, 27,128.24 and 10,705.79

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Solution

The fourth proportional to 19,657.79, 27,128.24 and 10,705.79 is: 14,774.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,657.79 : 27,128.24 = 10,705.79 : x
  2. Step 2: Convert to fraction form
    19,657.79/27,128.24 = 10,705.79/x
  3. Step 3: Cross multiply
    19,657.79x = 27,128.24 × 10,705.79
  4. Step 4: Simplify right side
    19,657.79x = 290,429,051.34
  5. Step 5: Solve for x
    x = 290,429,051.34/19,657.79
  6. Step 6: Final answer
    x = 14,774.25

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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.