Home / 28,113.06-42,183.36-12,315.96

Finding the Fourth Proportional to 28,113.06, 42,183.36 and 12,315.96

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Solution

The fourth proportional to 28,113.06, 42,183.36 and 12,315.96 is: 18,479.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,113.06 : 42,183.36 = 12,315.96 : x
  2. Step 2: Convert to fraction form
    28,113.06/42,183.36 = 12,315.96/x
  3. Step 3: Cross multiply
    28,113.06x = 42,183.36 × 12,315.96
  4. Step 4: Simplify right side
    28,113.06x = 519,528,574.43
  5. Step 5: Solve for x
    x = 519,528,574.43/28,113.06
  6. Step 6: Final answer
    x = 18,479.97

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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.