Home / 12,919,979.90-19,379,969.85-10,400,555.90

Finding the Fourth Proportional to 12,919,979.90, 19,379,969.85 and 10,400,555.90

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Solution

The fourth proportional to 12,919,979.90, 19,379,969.85 and 10,400,555.90 is: 15,600,833.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,919,979.90 : 19,379,969.85 = 10,400,555.90 : x
  2. Step 2: Convert to fraction form
    12,919,979.90/19,379,969.85 = 10,400,555.90/x
  3. Step 3: Cross multiply
    12,919,979.90x = 19,379,969.85 × 10,400,555.90
  4. Step 4: Simplify right side
    12,919,979.90x = 201,562,459,765,239.62
  5. Step 5: Solve for x
    x = 201,562,459,765,239.62/12,919,979.90
  6. Step 6: Final answer
    x = 15,600,833.85

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1.5x scale

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.