Home / 21,005,873.40-31,490,147.70-12,477,156.60

Finding the Fourth Proportional to 21,005,873.40, 31,490,147.70 and 12,477,156.60

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Solution

The fourth proportional to 21,005,873.40, 31,490,147.70 and 12,477,156.60 is: 18,704,649.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005,873.40 : 31,490,147.70 = 12,477,156.60 : x
  2. Step 2: Convert to fraction form
    21,005,873.40/31,490,147.70 = 12,477,156.60/x
  3. Step 3: Cross multiply
    21,005,873.40x = 31,490,147.70 × 12,477,156.60
  4. Step 4: Simplify right side
    21,005,873.40x = 392,907,504,210,029.81
  5. Step 5: Solve for x
    x = 392,907,504,210,029.81/21,005,873.40
  6. Step 6: Final answer
    x = 18,704,649.73

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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.