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Finding the Fourth Proportional to 14,435.53, 19,921.09 and 7,811.53

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Solution

The fourth proportional to 14,435.53, 19,921.09 and 7,811.53 is: 10,779.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,435.53 : 19,921.09 = 7,811.53 : x
  2. Step 2: Convert to fraction form
    14,435.53/19,921.09 = 7,811.53/x
  3. Step 3: Cross multiply
    14,435.53x = 19,921.09 × 7,811.53
  4. Step 4: Simplify right side
    14,435.53x = 155,614,241.48
  5. Step 5: Solve for x
    x = 155,614,241.48/14,435.53
  6. Step 6: Final answer
    x = 10,779.95

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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.