Home / 13,518.40-18,717.60-13,259.20

Finding the Fourth Proportional to 13,518.40, 18,717.60 and 13,259.20

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Solution

The fourth proportional to 13,518.40, 18,717.60 and 13,259.20 is: 18,358.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,518.40 : 18,717.60 = 13,259.20 : x
  2. Step 2: Convert to fraction form
    13,518.40/18,717.60 = 13,259.20/x
  3. Step 3: Cross multiply
    13,518.40x = 18,717.60 × 13,259.20
  4. Step 4: Simplify right side
    13,518.40x = 248,180,401.92
  5. Step 5: Solve for x
    x = 248,180,401.92/13,518.40
  6. Step 6: Final answer
    x = 18,358.71

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Half 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.