Home / 20,808,136.84-28,714,580.31-11,515,147.78

Finding the Fourth Proportional to 20,808,136.84, 28,714,580.31 and 11,515,147.78

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Solution

The fourth proportional to 20,808,136.84, 28,714,580.31 and 11,515,147.78 is: 15,890,545.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808,136.84 : 28,714,580.31 = 11,515,147.78 : x
  2. Step 2: Convert to fraction form
    20,808,136.84/28,714,580.31 = 11,515,147.78/x
  3. Step 3: Cross multiply
    20,808,136.84x = 28,714,580.31 × 11,515,147.78
  4. Step 4: Simplify right side
    20,808,136.84x = 330,652,635,710,328.19
  5. Step 5: Solve for x
    x = 330,652,635,710,328.19/20,808,136.84
  6. Step 6: Final answer
    x = 15,890,545.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.