Home / 28,054.80-38,715.59-15,479.55

Finding the Fourth Proportional to 28,054.80, 38,715.59 and 15,479.55

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Solution

The fourth proportional to 28,054.80, 38,715.59 and 15,479.55 is: 21,361.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,054.80 : 38,715.59 = 15,479.55 : x
  2. Step 2: Convert to fraction form
    28,054.80/38,715.59 = 15,479.55/x
  3. Step 3: Cross multiply
    28,054.80x = 38,715.59 × 15,479.55
  4. Step 4: Simplify right side
    28,054.80x = 599,299,911.18
  5. Step 5: Solve for x
    x = 599,299,911.18/28,054.80
  6. Step 6: Final answer
    x = 21,361.76

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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.