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Finding the Fourth Proportional to 14,457.88, 19,946.90 and 8,790.86

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Solution

The fourth proportional to 14,457.88, 19,946.90 and 8,790.86 is: 12,128.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,457.88 : 19,946.90 = 8,790.86 : x
  2. Step 2: Convert to fraction form
    14,457.88/19,946.90 = 8,790.86/x
  3. Step 3: Cross multiply
    14,457.88x = 19,946.90 × 8,790.86
  4. Step 4: Simplify right side
    14,457.88x = 175,350,405.33
  5. Step 5: Solve for x
    x = 175,350,405.33/14,457.88
  6. Step 6: Final answer
    x = 12,128.36

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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.