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Finding the Fourth Proportional to 13,055.90, 18,018.02 and 7,390.64

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Solution

The fourth proportional to 13,055.90, 18,018.02 and 7,390.64 is: 10,199.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,055.90 : 18,018.02 = 7,390.64 : x
  2. Step 2: Convert to fraction form
    13,055.90/18,018.02 = 7,390.64/x
  3. Step 3: Cross multiply
    13,055.90x = 18,018.02 × 7,390.64
  4. Step 4: Simplify right side
    13,055.90x = 133,164,699.33
  5. Step 5: Solve for x
    x = 133,164,699.33/13,055.90
  6. Step 6: Final answer
    x = 10,199.58

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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.