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Finding the Fourth Proportional to 21,887, 30,193.26 and 13,817.06

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Solution

The fourth proportional to 21,887, 30,193.26 and 13,817.06 is: 19,060.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,887 : 30,193.26 = 13,817.06 : x
  2. Step 2: Convert to fraction form
    21,887/30,193.26 = 13,817.06/x
  3. Step 3: Cross multiply
    21,887x = 30,193.26 × 13,817.06
  4. Step 4: Simplify right side
    21,887x = 417,182,085.02
  5. Step 5: Solve for x
    x = 417,182,085.02/21,887
  6. Step 6: Final answer
    x = 19,060.72

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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.