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Finding the Fourth Proportional to 19,989, 27,587.25 and 11,605.50

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Solution

The fourth proportional to 19,989, 27,587.25 and 11,605.50 is: 16,017.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,989 : 27,587.25 = 11,605.50 : x
  2. Step 2: Convert to fraction form
    19,989/27,587.25 = 11,605.50/x
  3. Step 3: Cross multiply
    19,989x = 27,587.25 × 11,605.50
  4. Step 4: Simplify right side
    19,989x = 320,163,829.88
  5. Step 5: Solve for x
    x = 320,163,829.88/19,989
  6. Step 6: Final answer
    x = 16,017.00

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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.