Home / 28,720.68-39,630.26-16,143

Finding the Fourth Proportional to 28,720.68, 39,630.26 and 16,143

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Solution

The fourth proportional to 28,720.68, 39,630.26 and 16,143 is: 22,274.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.68 : 39,630.26 = 16,143 : x
  2. Step 2: Convert to fraction form
    28,720.68/39,630.26 = 16,143/x
  3. Step 3: Cross multiply
    28,720.68x = 39,630.26 × 16,143
  4. Step 4: Simplify right side
    28,720.68x = 639,751,206.47
  5. Step 5: Solve for x
    x = 639,751,206.47/28,720.68
  6. Step 6: Final answer
    x = 22,274.93

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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.