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Finding the Fourth Proportional to 28,085.19, 42,134.67 and 8,363.67

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Solution

The fourth proportional to 28,085.19, 42,134.67 and 8,363.67 is: 12,547.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,085.19 : 42,134.67 = 8,363.67 : x
  2. Step 2: Convert to fraction form
    28,085.19/42,134.67 = 8,363.67/x
  3. Step 3: Cross multiply
    28,085.19x = 42,134.67 × 8,363.67
  4. Step 4: Simplify right side
    28,085.19x = 352,400,475.44
  5. Step 5: Solve for x
    x = 352,400,475.44/28,085.19
  6. Step 6: Final answer
    x = 12,547.56

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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.