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Finding the Fourth Proportional to 25,643.93, 38,364.72 and 19,421.93

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Solution

The fourth proportional to 25,643.93, 38,364.72 and 19,421.93 is: 29,056.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,643.93 : 38,364.72 = 19,421.93 : x
  2. Step 2: Convert to fraction form
    25,643.93/38,364.72 = 19,421.93/x
  3. Step 3: Cross multiply
    25,643.93x = 38,364.72 × 19,421.93
  4. Step 4: Simplify right side
    25,643.93x = 745,116,906.31
  5. Step 5: Solve for x
    x = 745,116,906.31/25,643.93
  6. Step 6: Final answer
    x = 29,056.27

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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.