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Finding the Fourth Proportional to 21,513,004.80, 30,140,601.60 and 21,513,004.80

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Solution

The fourth proportional to 21,513,004.80, 30,140,601.60 and 21,513,004.80 is: 30,140,601.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,513,004.80 : 30,140,601.60 = 21,513,004.80 : x
  2. Step 2: Convert to fraction form
    21,513,004.80/30,140,601.60 = 21,513,004.80/x
  3. Step 3: Cross multiply
    21,513,004.80x = 30,140,601.60 × 21,513,004.80
  4. Step 4: Simplify right side
    21,513,004.80x = 648,414,906,895,687.75
  5. Step 5: Solve for x
    x = 648,414,906,895,687.75/21,513,004.80
  6. Step 6: Final answer
    x = 30,140,601.60

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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.