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Finding the Fourth Proportional to 14,988.69, 20,702.79 and 11,228.67

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Solution

The fourth proportional to 14,988.69, 20,702.79 and 11,228.67 is: 15,509.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,988.69 : 20,702.79 = 11,228.67 : x
  2. Step 2: Convert to fraction form
    14,988.69/20,702.79 = 11,228.67/x
  3. Step 3: Cross multiply
    14,988.69x = 20,702.79 × 11,228.67
  4. Step 4: Simplify right side
    14,988.69x = 232,464,796.99
  5. Step 5: Solve for x
    x = 232,464,796.99/14,988.69
  6. Step 6: Final answer
    x = 15,509.35

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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.