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Finding the Fourth Proportional to 14,435.21, 19,921.48 and 8,061.80

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Solution

The fourth proportional to 14,435.21, 19,921.48 and 8,061.80 is: 11,125.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,435.21 : 19,921.48 = 8,061.80 : x
  2. Step 2: Convert to fraction form
    14,435.21/19,921.48 = 8,061.80/x
  3. Step 3: Cross multiply
    14,435.21x = 19,921.48 × 8,061.80
  4. Step 4: Simplify right side
    14,435.21x = 160,602,867.70
  5. Step 5: Solve for x
    x = 160,602,867.70/14,435.21
  6. Step 6: Final answer
    x = 11,125.77

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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.