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Finding the Fourth Proportional to 19,643.40, 29,421.90 and 17,051.40

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Solution

The fourth proportional to 19,643.40, 29,421.90 and 17,051.40 is: 25,539.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,643.40 : 29,421.90 = 17,051.40 : x
  2. Step 2: Convert to fraction form
    19,643.40/29,421.90 = 17,051.40/x
  3. Step 3: Cross multiply
    19,643.40x = 29,421.90 × 17,051.40
  4. Step 4: Simplify right side
    19,643.40x = 501,684,585.66
  5. Step 5: Solve for x
    x = 501,684,585.66/19,643.40
  6. Step 6: Final answer
    x = 25,539.60

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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.