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Finding the Fourth Proportional to 39,709.84, 54,799.17 and 21,804.67

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Solution

The fourth proportional to 39,709.84, 54,799.17 and 21,804.67 is: 30,090.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,709.84 : 54,799.17 = 21,804.67 : x
  2. Step 2: Convert to fraction form
    39,709.84/54,799.17 = 21,804.67/x
  3. Step 3: Cross multiply
    39,709.84x = 54,799.17 × 21,804.67
  4. Step 4: Simplify right side
    39,709.84x = 1,194,877,818.12
  5. Step 5: Solve for x
    x = 1,194,877,818.12/39,709.84
  6. Step 6: Final answer
    x = 30,090.22

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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.