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Finding the Fourth Proportional to 14,285.67, 21,430.78 and 4,928.04

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Solution

The fourth proportional to 14,285.67, 21,430.78 and 4,928.04 is: 7,392.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,285.67 : 21,430.78 = 4,928.04 : x
  2. Step 2: Convert to fraction form
    14,285.67/21,430.78 = 4,928.04/x
  3. Step 3: Cross multiply
    14,285.67x = 21,430.78 × 4,928.04
  4. Step 4: Simplify right side
    14,285.67x = 105,611,728.75
  5. Step 5: Solve for x
    x = 105,611,728.75/14,285.67
  6. Step 6: Final answer
    x = 7,392.85

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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.