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Finding the Fourth Proportional to 14,189.58, 19,578.63 and 8,220.90

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Solution

The fourth proportional to 14,189.58, 19,578.63 and 8,220.90 is: 11,343.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,189.58 : 19,578.63 = 8,220.90 : x
  2. Step 2: Convert to fraction form
    14,189.58/19,578.63 = 8,220.90/x
  3. Step 3: Cross multiply
    14,189.58x = 19,578.63 × 8,220.90
  4. Step 4: Simplify right side
    14,189.58x = 160,953,959.37
  5. Step 5: Solve for x
    x = 160,953,959.37/14,189.58
  6. Step 6: Final answer
    x = 11,343.11

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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.