Home / 21,000,779.40-31,501,169.10-13,115,769.60

Finding the Fourth Proportional to 21,000,779.40, 31,501,169.10 and 13,115,769.60

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Solution

The fourth proportional to 21,000,779.40, 31,501,169.10 and 13,115,769.60 is: 19,673,654.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000,779.40 : 31,501,169.10 = 13,115,769.60 : x
  2. Step 2: Convert to fraction form
    21,000,779.40/31,501,169.10 = 13,115,769.60/x
  3. Step 3: Cross multiply
    21,000,779.40x = 31,501,169.10 × 13,115,769.60
  4. Step 4: Simplify right side
    21,000,779.40x = 413,162,076,046,239.38
  5. Step 5: Solve for x
    x = 413,162,076,046,239.38/21,000,779.40
  6. Step 6: Final answer
    x = 19,673,654.40

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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.