Home / 21,082,877.60-31,561,330.80-12,558,826.40

Finding the Fourth Proportional to 21,082,877.60, 31,561,330.80 and 12,558,826.40

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Solution

The fourth proportional to 21,082,877.60, 31,561,330.80 and 12,558,826.40 is: 18,800,719.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,082,877.60 : 31,561,330.80 = 12,558,826.40 : x
  2. Step 2: Convert to fraction form
    21,082,877.60/31,561,330.80 = 12,558,826.40/x
  3. Step 3: Cross multiply
    21,082,877.60x = 31,561,330.80 × 12,558,826.40
  4. Step 4: Simplify right side
    21,082,877.60x = 396,373,274,470,173.12
  5. Step 5: Solve for x
    x = 396,373,274,470,173.12/21,082,877.60
  6. Step 6: Final answer
    x = 18,800,719.81

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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.