Home / 21,102,980.20-31,654,470.30-12,480,951.40

Finding the Fourth Proportional to 21,102,980.20, 31,654,470.30 and 12,480,951.40

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Solution

The fourth proportional to 21,102,980.20, 31,654,470.30 and 12,480,951.40 is: 18,721,427.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102,980.20 : 31,654,470.30 = 12,480,951.40 : x
  2. Step 2: Convert to fraction form
    21,102,980.20/31,654,470.30 = 12,480,951.40/x
  3. Step 3: Cross multiply
    21,102,980.20x = 31,654,470.30 × 12,480,951.40
  4. Step 4: Simplify right side
    21,102,980.20x = 395,077,905,407,043.44
  5. Step 5: Solve for x
    x = 395,077,905,407,043.44/21,102,980.20
  6. Step 6: Final answer
    x = 18,721,427.10

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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.