Home / 28,290.33-39,043.62-15,715.08

Finding the Fourth Proportional to 28,290.33, 39,043.62 and 15,715.08

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Solution

The fourth proportional to 28,290.33, 39,043.62 and 15,715.08 is: 21,688.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,290.33 : 39,043.62 = 15,715.08 : x
  2. Step 2: Convert to fraction form
    28,290.33/39,043.62 = 15,715.08/x
  3. Step 3: Cross multiply
    28,290.33x = 39,043.62 × 15,715.08
  4. Step 4: Simplify right side
    28,290.33x = 613,573,611.79
  5. Step 5: Solve for x
    x = 613,573,611.79/28,290.33
  6. Step 6: Final answer
    x = 21,688.46

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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.