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Finding the Fourth Proportional to 19,920.66, 29,999.58 and 17,354.58

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Solution

The fourth proportional to 19,920.66, 29,999.58 and 17,354.58 is: 26,135.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.66 : 29,999.58 = 17,354.58 : x
  2. Step 2: Convert to fraction form
    19,920.66/29,999.58 = 17,354.58/x
  3. Step 3: Cross multiply
    19,920.66x = 29,999.58 × 17,354.58
  4. Step 4: Simplify right side
    19,920.66x = 520,630,111.08
  5. Step 5: Solve for x
    x = 520,630,111.08/19,920.66
  6. Step 6: Final answer
    x = 26,135.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.