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Finding the Fourth Proportional to 14,419.68, 19,899.46 and 8,130.84

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Solution

The fourth proportional to 14,419.68, 19,899.46 and 8,130.84 is: 11,220.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,419.68 : 19,899.46 = 8,130.84 : x
  2. Step 2: Convert to fraction form
    14,419.68/19,899.46 = 8,130.84/x
  3. Step 3: Cross multiply
    14,419.68x = 19,899.46 × 8,130.84
  4. Step 4: Simplify right side
    14,419.68x = 161,799,325.35
  5. Step 5: Solve for x
    x = 161,799,325.35/14,419.68
  6. Step 6: Final answer
    x = 11,220.73

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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.