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Finding the Fourth Proportional to 13,670.76, 18,856.98 and 8,626.17

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Solution

The fourth proportional to 13,670.76, 18,856.98 and 8,626.17 is: 11,898.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,670.76 : 18,856.98 = 8,626.17 : x
  2. Step 2: Convert to fraction form
    13,670.76/18,856.98 = 8,626.17/x
  3. Step 3: Cross multiply
    13,670.76x = 18,856.98 × 8,626.17
  4. Step 4: Simplify right side
    13,670.76x = 162,663,515.17
  5. Step 5: Solve for x
    x = 162,663,515.17/13,670.76
  6. Step 6: Final answer
    x = 11,898.64

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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.