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Finding the Fourth Proportional to 14,617.90, 21,890.40 and 11,701.90

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Solution

The fourth proportional to 14,617.90, 21,890.40 and 11,701.90 is: 17,523.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,617.90 : 21,890.40 = 11,701.90 : x
  2. Step 2: Convert to fraction form
    14,617.90/21,890.40 = 11,701.90/x
  3. Step 3: Cross multiply
    14,617.90x = 21,890.40 × 11,701.90
  4. Step 4: Simplify right side
    14,617.90x = 256,159,271.76
  5. Step 5: Solve for x
    x = 256,159,271.76/14,617.90
  6. Step 6: Final answer
    x = 17,523.67

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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.