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Finding the Fourth Proportional to 20,218,978.80, 28,356,958.80 and 20,218,978.80

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Solution

The fourth proportional to 20,218,978.80, 28,356,958.80 and 20,218,978.80 is: 28,356,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218,978.80 : 28,356,958.80 = 20,218,978.80 : x
  2. Step 2: Convert to fraction form
    20,218,978.80/28,356,958.80 = 20,218,978.80/x
  3. Step 3: Cross multiply
    20,218,978.80x = 28,356,958.80 × 20,218,978.80
  4. Step 4: Simplify right side
    20,218,978.80x = 573,348,748,809,673.50
  5. Step 5: Solve for x
    x = 573,348,748,809,673.50/20,218,978.80
  6. Step 6: Final answer
    x = 28,356,958.80

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1.5x scale

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.