Home / 28,515.48-42,785.16-12,709.62

Finding the Fourth Proportional to 28,515.48, 42,785.16 and 12,709.62

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Solution

The fourth proportional to 28,515.48, 42,785.16 and 12,709.62 is: 19,069.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.48 : 42,785.16 = 12,709.62 : x
  2. Step 2: Convert to fraction form
    28,515.48/42,785.16 = 12,709.62/x
  3. Step 3: Cross multiply
    28,515.48x = 42,785.16 × 12,709.62
  4. Step 4: Simplify right side
    28,515.48x = 543,783,125.24
  5. Step 5: Solve for x
    x = 543,783,125.24/28,515.48
  6. Step 6: Final answer
    x = 19,069.75

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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.