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Finding the Fourth Proportional to 18,886,980.40, 28,330,470.60 and 18,886,980.40

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Solution

The fourth proportional to 18,886,980.40, 28,330,470.60 and 18,886,980.40 is: 28,330,470.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,886,980.40 : 28,330,470.60 = 18,886,980.40 : x
  2. Step 2: Convert to fraction form
    18,886,980.40/28,330,470.60 = 18,886,980.40/x
  3. Step 3: Cross multiply
    18,886,980.40x = 28,330,470.60 × 18,886,980.40
  4. Step 4: Simplify right side
    18,886,980.40x = 535,077,042,944,976.25
  5. Step 5: Solve for x
    x = 535,077,042,944,976.25/18,886,980.40
  6. Step 6: Final answer
    x = 28,330,470.60

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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.