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Finding the Fourth Proportional to 20,888.73, 28,810.16 and 12,935.37

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Solution

The fourth proportional to 20,888.73, 28,810.16 and 12,935.37 is: 17,840.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.73 : 28,810.16 = 12,935.37 : x
  2. Step 2: Convert to fraction form
    20,888.73/28,810.16 = 12,935.37/x
  3. Step 3: Cross multiply
    20,888.73x = 28,810.16 × 12,935.37
  4. Step 4: Simplify right side
    20,888.73x = 372,670,014.68
  5. Step 5: Solve for x
    x = 372,670,014.68/20,888.73
  6. Step 6: Final answer
    x = 17,840.72

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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.