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Finding the Fourth Proportional to 21,042, 31,577.80 and 19,032.09

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Solution

The fourth proportional to 21,042, 31,577.80 and 19,032.09 is: 28,561.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,042 : 31,577.80 = 19,032.09 : x
  2. Step 2: Convert to fraction form
    21,042/31,577.80 = 19,032.09/x
  3. Step 3: Cross multiply
    21,042x = 31,577.80 × 19,032.09
  4. Step 4: Simplify right side
    21,042x = 600,991,531.60
  5. Step 5: Solve for x
    x = 600,991,531.60/21,042
  6. Step 6: Final answer
    x = 28,561.52

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1.5x scale

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.