Home / 28,411.11-39,206.60-15,663.99

Finding the Fourth Proportional to 28,411.11, 39,206.60 and 15,663.99

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Solution

The fourth proportional to 28,411.11, 39,206.60 and 15,663.99 is: 21,615.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,411.11 : 39,206.60 = 15,663.99 : x
  2. Step 2: Convert to fraction form
    28,411.11/39,206.60 = 15,663.99/x
  3. Step 3: Cross multiply
    28,411.11x = 39,206.60 × 15,663.99
  4. Step 4: Simplify right side
    28,411.11x = 614,131,712.01
  5. Step 5: Solve for x
    x = 614,131,712.01/28,411.11
  6. Step 6: Final answer
    x = 21,615.90

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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.