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Finding the Fourth Proportional to 25,888,978.80, 38,858,351.40 and 13,123,897.20

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Solution

The fourth proportional to 25,888,978.80, 38,858,351.40 and 13,123,897.20 is: 19,698,459.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,888,978.80 : 38,858,351.40 = 13,123,897.20 : x
  2. Step 2: Convert to fraction form
    25,888,978.80/38,858,351.40 = 13,123,897.20/x
  3. Step 3: Cross multiply
    25,888,978.80x = 38,858,351.40 × 13,123,897.20
  4. Step 4: Simplify right side
    25,888,978.80x = 509,973,009,135,076.06
  5. Step 5: Solve for x
    x = 509,973,009,135,076.06/25,888,978.80
  6. Step 6: Final answer
    x = 19,698,459.84

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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.