Home / 28,554.78-39,405.65-15,979.53

Finding the Fourth Proportional to 28,554.78, 39,405.65 and 15,979.53

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Solution

The fourth proportional to 28,554.78, 39,405.65 and 15,979.53 is: 22,051.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,554.78 : 39,405.65 = 15,979.53 : x
  2. Step 2: Convert to fraction form
    28,554.78/39,405.65 = 15,979.53/x
  3. Step 3: Cross multiply
    28,554.78x = 39,405.65 × 15,979.53
  4. Step 4: Simplify right side
    28,554.78x = 629,683,686.45
  5. Step 5: Solve for x
    x = 629,683,686.45/28,554.78
  6. Step 6: Final answer
    x = 22,051.78

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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.