Home / 28,179.09-38,888.31-15,603.84

Finding the Fourth Proportional to 28,179.09, 38,888.31 and 15,603.84

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Solution

The fourth proportional to 28,179.09, 38,888.31 and 15,603.84 is: 21,533.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,179.09 : 38,888.31 = 15,603.84 : x
  2. Step 2: Convert to fraction form
    28,179.09/38,888.31 = 15,603.84/x
  3. Step 3: Cross multiply
    28,179.09x = 38,888.31 × 15,603.84
  4. Step 4: Simplify right side
    28,179.09x = 606,806,772.67
  5. Step 5: Solve for x
    x = 606,806,772.67/28,179.09
  6. Step 6: Final answer
    x = 21,533.94

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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.