Home / 28,388.32-39,173.40-15,639.04

Finding the Fourth Proportional to 28,388.32, 39,173.40 and 15,639.04

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Solution

The fourth proportional to 28,388.32, 39,173.40 and 15,639.04 is: 21,580.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,388.32 : 39,173.40 = 15,639.04 : x
  2. Step 2: Convert to fraction form
    28,388.32/39,173.40 = 15,639.04/x
  3. Step 3: Cross multiply
    28,388.32x = 39,173.40 × 15,639.04
  4. Step 4: Simplify right side
    28,388.32x = 612,634,369.54
  5. Step 5: Solve for x
    x = 612,634,369.54/28,388.32
  6. Step 6: Final answer
    x = 21,580.51

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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.