Home / 13,348.77-18,421.20-7,380.69

Finding the Fourth Proportional to 13,348.77, 18,421.20 and 7,380.69

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Solution

The fourth proportional to 13,348.77, 18,421.20 and 7,380.69 is: 10,185.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,348.77 : 18,421.20 = 7,380.69 : x
  2. Step 2: Convert to fraction form
    13,348.77/18,421.20 = 7,380.69/x
  3. Step 3: Cross multiply
    13,348.77x = 18,421.20 × 7,380.69
  4. Step 4: Simplify right side
    13,348.77x = 135,961,166.63
  5. Step 5: Solve for x
    x = 135,961,166.63/13,348.77
  6. Step 6: Final answer
    x = 10,185.30

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Half scale
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Double scale
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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.