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Finding the Fourth Proportional to 14,689.90, 20,272.22 and 7,975.60

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Solution

The fourth proportional to 14,689.90, 20,272.22 and 7,975.60 is: 11,006.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,689.90 : 20,272.22 = 7,975.60 : x
  2. Step 2: Convert to fraction form
    14,689.90/20,272.22 = 7,975.60/x
  3. Step 3: Cross multiply
    14,689.90x = 20,272.22 × 7,975.60
  4. Step 4: Simplify right side
    14,689.90x = 161,683,117.83
  5. Step 5: Solve for x
    x = 161,683,117.83/14,689.90
  6. Step 6: Final answer
    x = 11,006.41

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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.