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Finding the Fourth Proportional to 19,315.29, 28,981.44 and 8,223.15

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Solution

The fourth proportional to 19,315.29, 28,981.44 and 8,223.15 is: 12,338.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,315.29 : 28,981.44 = 8,223.15 : x
  2. Step 2: Convert to fraction form
    19,315.29/28,981.44 = 8,223.15/x
  3. Step 3: Cross multiply
    19,315.29x = 28,981.44 × 8,223.15
  4. Step 4: Simplify right side
    19,315.29x = 238,318,728.34
  5. Step 5: Solve for x
    x = 238,318,728.34/19,315.29
  6. Step 6: Final answer
    x = 12,338.35

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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.