Home / 20,911.67-28,857.47-14,953.31

Finding the Fourth Proportional to 20,911.67, 28,857.47 and 14,953.31

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Solution

The fourth proportional to 20,911.67, 28,857.47 and 14,953.31 is: 20,635.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.67 : 28,857.47 = 14,953.31 : x
  2. Step 2: Convert to fraction form
    20,911.67/28,857.47 = 14,953.31/x
  3. Step 3: Cross multiply
    20,911.67x = 28,857.47 × 14,953.31
  4. Step 4: Simplify right side
    20,911.67x = 431,514,583.89
  5. Step 5: Solve for x
    x = 431,514,583.89/20,911.67
  6. Step 6: Final answer
    x = 20,635.11

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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.