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Finding the Fourth Proportional to 13,915.14, 20,848.40 and 11,590.08

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Solution

The fourth proportional to 13,915.14, 20,848.40 and 11,590.08 is: 17,364.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,915.14 : 20,848.40 = 11,590.08 : x
  2. Step 2: Convert to fraction form
    13,915.14/20,848.40 = 11,590.08/x
  3. Step 3: Cross multiply
    13,915.14x = 20,848.40 × 11,590.08
  4. Step 4: Simplify right side
    13,915.14x = 241,634,623.87
  5. Step 5: Solve for x
    x = 241,634,623.87/13,915.14
  6. Step 6: Final answer
    x = 17,364.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.