Home / 20,728.47-31,092.54-9,628.98

Finding the Fourth Proportional to 20,728.47, 31,092.54 and 9,628.98

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Solution

The fourth proportional to 20,728.47, 31,092.54 and 9,628.98 is: 14,443.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.47 : 31,092.54 = 9,628.98 : x
  2. Step 2: Convert to fraction form
    20,728.47/31,092.54 = 9,628.98/x
  3. Step 3: Cross multiply
    20,728.47x = 31,092.54 × 9,628.98
  4. Step 4: Simplify right side
    20,728.47x = 299,389,445.81
  5. Step 5: Solve for x
    x = 299,389,445.81/20,728.47
  6. Step 6: Final answer
    x = 14,443.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.