Home / 28,340.80-42,511.20-19,009.60

Finding the Fourth Proportional to 28,340.80, 42,511.20 and 19,009.60

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Solution

The fourth proportional to 28,340.80, 42,511.20 and 19,009.60 is: 28,514.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,340.80 : 42,511.20 = 19,009.60 : x
  2. Step 2: Convert to fraction form
    28,340.80/42,511.20 = 19,009.60/x
  3. Step 3: Cross multiply
    28,340.80x = 42,511.20 × 19,009.60
  4. Step 4: Simplify right side
    28,340.80x = 808,120,907.52
  5. Step 5: Solve for x
    x = 808,120,907.52/28,340.80
  6. Step 6: Final answer
    x = 28,514.40

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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.