Home / 28,678.15-43,017.18-18,815.08

Finding the Fourth Proportional to 28,678.15, 43,017.18 and 18,815.08

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Solution

The fourth proportional to 28,678.15, 43,017.18 and 18,815.08 is: 28,222.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,678.15 : 43,017.18 = 18,815.08 : x
  2. Step 2: Convert to fraction form
    28,678.15/43,017.18 = 18,815.08/x
  3. Step 3: Cross multiply
    28,678.15x = 43,017.18 × 18,815.08
  4. Step 4: Simplify right side
    28,678.15x = 809,371,683.07
  5. Step 5: Solve for x
    x = 809,371,683.07/28,678.15
  6. Step 6: Final answer
    x = 28,222.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.