Home / 14,143.79-21,215.69-4,283.05

Finding the Fourth Proportional to 14,143.79, 21,215.69 and 4,283.05

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Solution

The fourth proportional to 14,143.79, 21,215.69 and 4,283.05 is: 6,424.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,143.79 : 21,215.69 = 4,283.05 : x
  2. Step 2: Convert to fraction form
    14,143.79/21,215.69 = 4,283.05/x
  3. Step 3: Cross multiply
    14,143.79x = 21,215.69 × 4,283.05
  4. Step 4: Simplify right side
    14,143.79x = 90,867,861.05
  5. Step 5: Solve for x
    x = 90,867,861.05/14,143.79
  6. Step 6: Final answer
    x = 6,424.58

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Double scale
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Similar ratio
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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.