Home / 21,020,438.28-31,515,517.89-12,916,668.36

Finding the Fourth Proportional to 21,020,438.28, 31,515,517.89 and 12,916,668.36

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Solution

The fourth proportional to 21,020,438.28, 31,515,517.89 and 12,916,668.36 is: 19,365,699.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020,438.28 : 31,515,517.89 = 12,916,668.36 : x
  2. Step 2: Convert to fraction form
    21,020,438.28/31,515,517.89 = 12,916,668.36/x
  3. Step 3: Cross multiply
    21,020,438.28x = 31,515,517.89 × 12,916,668.36
  4. Step 4: Simplify right side
    21,020,438.28x = 407,075,492,778,776.94
  5. Step 5: Solve for x
    x = 407,075,492,778,776.94/21,020,438.28
  6. Step 6: Final answer
    x = 19,365,699.58

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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.