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Finding the Fourth Proportional to 13,341.60, 19,981.71 and 8,398.98

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Solution

The fourth proportional to 13,341.60, 19,981.71 and 8,398.98 is: 12,579.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,341.60 : 19,981.71 = 8,398.98 : x
  2. Step 2: Convert to fraction form
    13,341.60/19,981.71 = 8,398.98/x
  3. Step 3: Cross multiply
    13,341.60x = 19,981.71 × 8,398.98
  4. Step 4: Simplify right side
    13,341.60x = 167,825,982.66
  5. Step 5: Solve for x
    x = 167,825,982.66/13,341.60
  6. Step 6: Final answer
    x = 12,579.15

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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.