Home / 28,261.09-39,000.78-15,515.47

Finding the Fourth Proportional to 28,261.09, 39,000.78 and 15,515.47

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Solution

The fourth proportional to 28,261.09, 39,000.78 and 15,515.47 is: 21,411.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,261.09 : 39,000.78 = 15,515.47 : x
  2. Step 2: Convert to fraction form
    28,261.09/39,000.78 = 15,515.47/x
  3. Step 3: Cross multiply
    28,261.09x = 39,000.78 × 15,515.47
  4. Step 4: Simplify right side
    28,261.09x = 605,115,432.07
  5. Step 5: Solve for x
    x = 605,115,432.07/28,261.09
  6. Step 6: Final answer
    x = 21,411.61

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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.