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Finding the Fourth Proportional to 21,564,978.06, 29,709,095.58 and 15,026,744.46

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Solution

The fourth proportional to 21,564,978.06, 29,709,095.58 and 15,026,744.46 is: 20,701,666.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,564,978.06 : 29,709,095.58 = 15,026,744.46 : x
  2. Step 2: Convert to fraction form
    21,564,978.06/29,709,095.58 = 15,026,744.46/x
  3. Step 3: Cross multiply
    21,564,978.06x = 29,709,095.58 × 15,026,744.46
  4. Step 4: Simplify right side
    21,564,978.06x = 446,430,987,418,375.50
  5. Step 5: Solve for x
    x = 446,430,987,418,375.50/21,564,978.06
  6. Step 6: Final answer
    x = 20,701,666.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.