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Finding the Fourth Proportional to 13,071.70, 18,039.02 and 7,103.36

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Solution

The fourth proportional to 13,071.70, 18,039.02 and 7,103.36 is: 9,802.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,071.70 : 18,039.02 = 7,103.36 : x
  2. Step 2: Convert to fraction form
    13,071.70/18,039.02 = 7,103.36/x
  3. Step 3: Cross multiply
    13,071.70x = 18,039.02 × 7,103.36
  4. Step 4: Simplify right side
    13,071.70x = 128,137,653.11
  5. Step 5: Solve for x
    x = 128,137,653.11/13,071.70
  6. Step 6: Final answer
    x = 9,802.68

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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.