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Finding the Fourth Proportional to 14,420.15, 19,899.80 and 8,132.52

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Solution

The fourth proportional to 14,420.15, 19,899.80 and 8,132.52 is: 11,222.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,420.15 : 19,899.80 = 8,132.52 : x
  2. Step 2: Convert to fraction form
    14,420.15/19,899.80 = 8,132.52/x
  3. Step 3: Cross multiply
    14,420.15x = 19,899.80 × 8,132.52
  4. Step 4: Simplify right side
    14,420.15x = 161,835,480.83
  5. Step 5: Solve for x
    x = 161,835,480.83/14,420.15
  6. Step 6: Final answer
    x = 11,222.87

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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.