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Finding the Fourth Proportional to 14,287.81, 21,434.16 and 4,928.80

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Solution

The fourth proportional to 14,287.81, 21,434.16 and 4,928.80 is: 7,394.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,287.81 : 21,434.16 = 4,928.80 : x
  2. Step 2: Convert to fraction form
    14,287.81/21,434.16 = 4,928.80/x
  3. Step 3: Cross multiply
    14,287.81x = 21,434.16 × 4,928.80
  4. Step 4: Simplify right side
    14,287.81x = 105,644,687.81
  5. Step 5: Solve for x
    x = 105,644,687.81/14,287.81
  6. Step 6: Final answer
    x = 7,394.04

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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.