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Finding the Fourth Proportional to 21,805,813.20, 32,671,978.20 and 17,239,357.20

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Solution

The fourth proportional to 21,805,813.20, 32,671,978.20 and 17,239,357.20 is: 25,829,988.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,805,813.20 : 32,671,978.20 = 17,239,357.20 : x
  2. Step 2: Convert to fraction form
    21,805,813.20/32,671,978.20 = 17,239,357.20/x
  3. Step 3: Cross multiply
    21,805,813.20x = 32,671,978.20 × 17,239,357.20
  4. Step 4: Simplify right side
    21,805,813.20x = 563,243,902,620,413
  5. Step 5: Solve for x
    x = 563,243,902,620,413/21,805,813.20
  6. Step 6: Final answer
    x = 25,829,988.43

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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.