Home / 28,315.89-39,076.38-15,569.62

Finding the Fourth Proportional to 28,315.89, 39,076.38 and 15,569.62

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Solution

The fourth proportional to 28,315.89, 39,076.38 and 15,569.62 is: 21,486.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,315.89 : 39,076.38 = 15,569.62 : x
  2. Step 2: Convert to fraction form
    28,315.89/39,076.38 = 15,569.62/x
  3. Step 3: Cross multiply
    28,315.89x = 39,076.38 × 15,569.62
  4. Step 4: Simplify right side
    28,315.89x = 608,404,387.58
  5. Step 5: Solve for x
    x = 608,404,387.58/28,315.89
  6. Step 6: Final answer
    x = 21,486.32

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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.