Home / 18,638.19-25,720.61-10,680.21

Finding the Fourth Proportional to 18,638.19, 25,720.61 and 10,680.21

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Solution

The fourth proportional to 18,638.19, 25,720.61 and 10,680.21 is: 14,738.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.19 : 25,720.61 = 10,680.21 : x
  2. Step 2: Convert to fraction form
    18,638.19/25,720.61 = 10,680.21/x
  3. Step 3: Cross multiply
    18,638.19x = 25,720.61 × 10,680.21
  4. Step 4: Simplify right side
    18,638.19x = 274,701,462.73
  5. Step 5: Solve for x
    x = 274,701,462.73/18,638.19
  6. Step 6: Final answer
    x = 14,738.63

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Half scale
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Double scale
Find fourth proportional to 18,639.19, 25,721.98 and 10,681.21
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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.