Home / 28,064.32-38,728.57-15,489.07

Finding the Fourth Proportional to 28,064.32, 38,728.57 and 15,489.07

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Solution

The fourth proportional to 28,064.32, 38,728.57 and 15,489.07 is: 21,374.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,064.32 : 38,728.57 = 15,489.07 : x
  2. Step 2: Convert to fraction form
    28,064.32/38,728.57 = 15,489.07/x
  3. Step 3: Cross multiply
    28,064.32x = 38,728.57 × 15,489.07
  4. Step 4: Simplify right side
    28,064.32x = 599,869,531.73
  5. Step 5: Solve for x
    x = 599,869,531.73/28,064.32
  6. Step 6: Final answer
    x = 21,374.81

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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.