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Finding the Fourth Proportional to 19,756.80, 29,602.40 and 13,901.10

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Solution

The fourth proportional to 19,756.80, 29,602.40 and 13,901.10 is: 20,828.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,756.80 : 29,602.40 = 13,901.10 : x
  2. Step 2: Convert to fraction form
    19,756.80/29,602.40 = 13,901.10/x
  3. Step 3: Cross multiply
    19,756.80x = 29,602.40 × 13,901.10
  4. Step 4: Simplify right side
    19,756.80x = 411,505,922.64
  5. Step 5: Solve for x
    x = 411,505,922.64/19,756.80
  6. Step 6: Final answer
    x = 20,828.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.