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Finding the Fourth Proportional to 21,973, 32,959.56 and 6,391

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Solution

The fourth proportional to 21,973, 32,959.56 and 6,391 is: 9,586.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,973 : 32,959.56 = 6,391 : x
  2. Step 2: Convert to fraction form
    21,973/32,959.56 = 6,391/x
  3. Step 3: Cross multiply
    21,973x = 32,959.56 × 6,391
  4. Step 4: Simplify right side
    21,973x = 210,644,547.96
  5. Step 5: Solve for x
    x = 210,644,547.96/21,973
  6. Step 6: Final answer
    x = 9,586.52

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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.