Home / 20,672.26-28,477.09-14,990.31

Finding the Fourth Proportional to 20,672.26, 28,477.09 and 14,990.31

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Solution

The fourth proportional to 20,672.26, 28,477.09 and 14,990.31 is: 20,649.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,672.26 : 28,477.09 = 14,990.31 : x
  2. Step 2: Convert to fraction form
    20,672.26/28,477.09 = 14,990.31/x
  3. Step 3: Cross multiply
    20,672.26x = 28,477.09 × 14,990.31
  4. Step 4: Simplify right side
    20,672.26x = 426,880,407.00
  5. Step 5: Solve for x
    x = 426,880,407.00/20,672.26
  6. Step 6: Final answer
    x = 20,649.91

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1.5x scale

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.