Home / 21,020,410.05-31,530,615.08-12,375,636.45

Finding the Fourth Proportional to 21,020,410.05, 31,530,615.08 and 12,375,636.45

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Solution

The fourth proportional to 21,020,410.05, 31,530,615.08 and 12,375,636.45 is: 18,563,454.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020,410.05 : 31,530,615.08 = 12,375,636.45 : x
  2. Step 2: Convert to fraction form
    21,020,410.05/31,530,615.08 = 12,375,636.45/x
  3. Step 3: Cross multiply
    21,020,410.05x = 31,530,615.08 × 12,375,636.45
  4. Step 4: Simplify right side
    21,020,410.05x = 390,211,429,213,089.44
  5. Step 5: Solve for x
    x = 390,211,429,213,089.44/21,020,410.05
  6. Step 6: Final answer
    x = 18,563,454.68

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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.