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Finding the Fourth Proportional to 14,281.75, 19,708.09 and 7,821.22

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Solution

The fourth proportional to 14,281.75, 19,708.09 and 7,821.22 is: 10,792.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,281.75 : 19,708.09 = 7,821.22 : x
  2. Step 2: Convert to fraction form
    14,281.75/19,708.09 = 7,821.22/x
  3. Step 3: Cross multiply
    14,281.75x = 19,708.09 × 7,821.22
  4. Step 4: Simplify right side
    14,281.75x = 154,141,307.67
  5. Step 5: Solve for x
    x = 154,141,307.67/14,281.75
  6. Step 6: Final answer
    x = 10,792.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.