Home / 21,298,718.40-31,929,415.20-12,770,001.60

Finding the Fourth Proportional to 21,298,718.40, 31,929,415.20 and 12,770,001.60

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Solution

The fourth proportional to 21,298,718.40, 31,929,415.20 and 12,770,001.60 is: 19,143,813.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,298,718.40 : 31,929,415.20 = 12,770,001.60 : x
  2. Step 2: Convert to fraction form
    21,298,718.40/31,929,415.20 = 12,770,001.60/x
  3. Step 3: Cross multiply
    21,298,718.40x = 31,929,415.20 × 12,770,001.60
  4. Step 4: Simplify right side
    21,298,718.40x = 407,738,683,191,064.31
  5. Step 5: Solve for x
    x = 407,738,683,191,064.31/21,298,718.40
  6. Step 6: Final answer
    x = 19,143,813.05

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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.