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Finding the Fourth Proportional to 21,499,897.60, 30,184,887.20 and 21,499,897.60

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Solution

The fourth proportional to 21,499,897.60, 30,184,887.20 and 21,499,897.60 is: 30,184,887.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,499,897.60 : 30,184,887.20 = 21,499,897.60 : x
  2. Step 2: Convert to fraction form
    21,499,897.60/30,184,887.20 = 21,499,897.60/x
  3. Step 3: Cross multiply
    21,499,897.60x = 30,184,887.20 × 21,499,897.60
  4. Step 4: Simplify right side
    21,499,897.60x = 648,971,983,867,550.75
  5. Step 5: Solve for x
    x = 648,971,983,867,550.75/21,499,897.60
  6. Step 6: Final answer
    x = 30,184,887.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.