Home / 13,528.74-18,670.32-8,220.36

Finding the Fourth Proportional to 13,528.74, 18,670.32 and 8,220.36

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Solution

The fourth proportional to 13,528.74, 18,670.32 and 8,220.36 is: 11,344.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,528.74 : 18,670.32 = 8,220.36 : x
  2. Step 2: Convert to fraction form
    13,528.74/18,670.32 = 8,220.36/x
  3. Step 3: Cross multiply
    13,528.74x = 18,670.32 × 8,220.36
  4. Step 4: Simplify right side
    13,528.74x = 153,476,751.72
  5. Step 5: Solve for x
    x = 153,476,751.72/13,528.74
  6. Step 6: Final answer
    x = 11,344.50

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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.