Home / 20,630,675.40-28,470,468.66-12,900,242.76

Finding the Fourth Proportional to 20,630,675.40, 28,470,468.66 and 12,900,242.76

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Solution

The fourth proportional to 20,630,675.40, 28,470,468.66 and 12,900,242.76 is: 17,802,420.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630,675.40 : 28,470,468.66 = 12,900,242.76 : x
  2. Step 2: Convert to fraction form
    20,630,675.40/28,470,468.66 = 12,900,242.76/x
  3. Step 3: Cross multiply
    20,630,675.40x = 28,470,468.66 × 12,900,242.76
  4. Step 4: Simplify right side
    20,630,675.40x = 367,275,957,204,971.88
  5. Step 5: Solve for x
    x = 367,275,957,204,971.88/20,630,675.40
  6. Step 6: Final answer
    x = 17,802,420.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.