Home / 28,465.80-42,698.70-20,155.20

Finding the Fourth Proportional to 28,465.80, 42,698.70 and 20,155.20

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Solution

The fourth proportional to 28,465.80, 42,698.70 and 20,155.20 is: 30,232.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,465.80 : 42,698.70 = 20,155.20 : x
  2. Step 2: Convert to fraction form
    28,465.80/42,698.70 = 20,155.20/x
  3. Step 3: Cross multiply
    28,465.80x = 42,698.70 × 20,155.20
  4. Step 4: Simplify right side
    28,465.80x = 860,600,838.24
  5. Step 5: Solve for x
    x = 860,600,838.24/28,465.80
  6. Step 6: Final answer
    x = 30,232.80

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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.