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Finding the Fourth Proportional to 20,368.67, 30,557.66 and 7,888.79

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Solution

The fourth proportional to 20,368.67, 30,557.66 and 7,888.79 is: 11,834.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,368.67 : 30,557.66 = 7,888.79 : x
  2. Step 2: Convert to fraction form
    20,368.67/30,557.66 = 7,888.79/x
  3. Step 3: Cross multiply
    20,368.67x = 30,557.66 × 7,888.79
  4. Step 4: Simplify right side
    20,368.67x = 241,062,999.58
  5. Step 5: Solve for x
    x = 241,062,999.58/20,368.67
  6. Step 6: Final answer
    x = 11,834.99

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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.