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Finding the Fourth Proportional to 14,511.78, 20,070.45 and 13,019.15

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Solution

The fourth proportional to 14,511.78, 20,070.45 and 13,019.15 is: 18,006.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,511.78 : 20,070.45 = 13,019.15 : x
  2. Step 2: Convert to fraction form
    14,511.78/20,070.45 = 13,019.15/x
  3. Step 3: Cross multiply
    14,511.78x = 20,070.45 × 13,019.15
  4. Step 4: Simplify right side
    14,511.78x = 261,300,249.29
  5. Step 5: Solve for x
    x = 261,300,249.29/14,511.78
  6. Step 6: Final answer
    x = 18,006.08

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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.