Home / 28,376.74-39,159.59-15,629.68

Finding the Fourth Proportional to 28,376.74, 39,159.59 and 15,629.68

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Solution

The fourth proportional to 28,376.74, 39,159.59 and 15,629.68 is: 21,568.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,376.74 : 39,159.59 = 15,629.68 : x
  2. Step 2: Convert to fraction form
    28,376.74/39,159.59 = 15,629.68/x
  3. Step 3: Cross multiply
    28,376.74x = 39,159.59 × 15,629.68
  4. Step 4: Simplify right side
    28,376.74x = 612,051,782.48
  5. Step 5: Solve for x
    x = 612,051,782.48/28,376.74
  6. Step 6: Final answer
    x = 21,568.78

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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.