Home / 21,190.10-29,241.60-13,636.76

Finding the Fourth Proportional to 21,190.10, 29,241.60 and 13,636.76

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Solution

The fourth proportional to 21,190.10, 29,241.60 and 13,636.76 is: 18,818.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.10 : 29,241.60 = 13,636.76 : x
  2. Step 2: Convert to fraction form
    21,190.10/29,241.60 = 13,636.76/x
  3. Step 3: Cross multiply
    21,190.10x = 29,241.60 × 13,636.76
  4. Step 4: Simplify right side
    21,190.10x = 398,760,681.22
  5. Step 5: Solve for x
    x = 398,760,681.22/21,190.10
  6. Step 6: Final answer
    x = 18,818.25

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Half scale
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Double scale
Find fourth proportional to 21,191.10, 29,242.98 and 13,637.76
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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.