Home / 20,989.86-28,916.73-14,605.49

Finding the Fourth Proportional to 20,989.86, 28,916.73 and 14,605.49

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Solution

The fourth proportional to 20,989.86, 28,916.73 and 14,605.49 is: 20,121.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.86 : 28,916.73 = 14,605.49 : x
  2. Step 2: Convert to fraction form
    20,989.86/28,916.73 = 14,605.49/x
  3. Step 3: Cross multiply
    20,989.86x = 28,916.73 × 14,605.49
  4. Step 4: Simplify right side
    20,989.86x = 422,342,866.26
  5. Step 5: Solve for x
    x = 422,342,866.26/20,989.86
  6. Step 6: Final answer
    x = 20,121.28

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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.