Home / 28,618.05-39,491.81-15,871.76

Finding the Fourth Proportional to 28,618.05, 39,491.81 and 15,871.76

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Solution

The fourth proportional to 28,618.05, 39,491.81 and 15,871.76 is: 21,902.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,618.05 : 39,491.81 = 15,871.76 : x
  2. Step 2: Convert to fraction form
    28,618.05/39,491.81 = 15,871.76/x
  3. Step 3: Cross multiply
    28,618.05x = 39,491.81 × 15,871.76
  4. Step 4: Simplify right side
    28,618.05x = 626,804,530.29
  5. Step 5: Solve for x
    x = 626,804,530.29/28,618.05
  6. Step 6: Final answer
    x = 21,902.42

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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.