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Finding the Fourth Proportional to 21,581,655.80, 32,372,483.70 and 11,992,448.12

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Solution

The fourth proportional to 21,581,655.80, 32,372,483.70 and 11,992,448.12 is: 17,988,672.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,581,655.80 : 32,372,483.70 = 11,992,448.12 : x
  2. Step 2: Convert to fraction form
    21,581,655.80/32,372,483.70 = 11,992,448.12/x
  3. Step 3: Cross multiply
    21,581,655.80x = 32,372,483.70 × 11,992,448.12
  4. Step 4: Simplify right side
    21,581,655.80x = 388,225,331,287,795.62
  5. Step 5: Solve for x
    x = 388,225,331,287,795.62/21,581,655.80
  6. Step 6: Final answer
    x = 17,988,672.18

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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.