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Finding the Fourth Proportional to 14,259.40, 21,389.10 and 13,683.40

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Solution

The fourth proportional to 14,259.40, 21,389.10 and 13,683.40 is: 20,525.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,259.40 : 21,389.10 = 13,683.40 : x
  2. Step 2: Convert to fraction form
    14,259.40/21,389.10 = 13,683.40/x
  3. Step 3: Cross multiply
    14,259.40x = 21,389.10 × 13,683.40
  4. Step 4: Simplify right side
    14,259.40x = 292,675,610.94
  5. Step 5: Solve for x
    x = 292,675,610.94/14,259.40
  6. Step 6: Final answer
    x = 20,525.10

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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.