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Finding the Fourth Proportional to 18,989.76, 26,207.04 and 10,491.84

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Solution

The fourth proportional to 18,989.76, 26,207.04 and 10,491.84 is: 14,479.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989.76 : 26,207.04 = 10,491.84 : x
  2. Step 2: Convert to fraction form
    18,989.76/26,207.04 = 10,491.84/x
  3. Step 3: Cross multiply
    18,989.76x = 26,207.04 × 10,491.84
  4. Step 4: Simplify right side
    18,989.76x = 274,960,070.55
  5. Step 5: Solve for x
    x = 274,960,070.55/18,989.76
  6. Step 6: Final answer
    x = 14,479.39

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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.