Home / 21,197,779.20-31,796,668.80-19,638,885.60

Finding the Fourth Proportional to 21,197,779.20, 31,796,668.80 and 19,638,885.60

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Solution

The fourth proportional to 21,197,779.20, 31,796,668.80 and 19,638,885.60 is: 29,458,328.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,197,779.20 : 31,796,668.80 = 19,638,885.60 : x
  2. Step 2: Convert to fraction form
    21,197,779.20/31,796,668.80 = 19,638,885.60/x
  3. Step 3: Cross multiply
    21,197,779.20x = 31,796,668.80 × 19,638,885.60
  4. Step 4: Simplify right side
    21,197,779.20x = 624,451,141,024,289.38
  5. Step 5: Solve for x
    x = 624,451,141,024,289.38/21,197,779.20
  6. Step 6: Final answer
    x = 29,458,328.40

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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.