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Finding the Fourth Proportional to 28,404,978.15, 42,607,467.23 and 19,712,965.35

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Solution

The fourth proportional to 28,404,978.15, 42,607,467.23 and 19,712,965.35 is: 29,569,448.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,404,978.15 : 42,607,467.23 = 19,712,965.35 : x
  2. Step 2: Convert to fraction form
    28,404,978.15/42,607,467.23 = 19,712,965.35/x
  3. Step 3: Cross multiply
    28,404,978.15x = 42,607,467.23 × 19,712,965.35
  4. Step 4: Simplify right side
    28,404,978.15x = 839,919,525,156,250.50
  5. Step 5: Solve for x
    x = 839,919,525,156,250.50/28,404,978.15
  6. Step 6: Final answer
    x = 29,569,448.03

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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.