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Finding the Fourth Proportional to 20,806,652.20, 31,209,978.30 and 7,341,730.60

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Solution

The fourth proportional to 20,806,652.20, 31,209,978.30 and 7,341,730.60 is: 11,012,595.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806,652.20 : 31,209,978.30 = 7,341,730.60 : x
  2. Step 2: Convert to fraction form
    20,806,652.20/31,209,978.30 = 7,341,730.60/x
  3. Step 3: Cross multiply
    20,806,652.20x = 31,209,978.30 × 7,341,730.60
  4. Step 4: Simplify right side
    20,806,652.20x = 229,135,252,710,445.97
  5. Step 5: Solve for x
    x = 229,135,252,710,445.97/20,806,652.20
  6. Step 6: Final answer
    x = 11,012,595.90

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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.