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Finding the Fourth Proportional to 13,069.51, 18,036.09 and 7,101.28

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Solution

The fourth proportional to 13,069.51, 18,036.09 and 7,101.28 is: 9,799.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,069.51 : 18,036.09 = 7,101.28 : x
  2. Step 2: Convert to fraction form
    13,069.51/18,036.09 = 7,101.28/x
  3. Step 3: Cross multiply
    13,069.51x = 18,036.09 × 7,101.28
  4. Step 4: Simplify right side
    13,069.51x = 128,079,347.74
  5. Step 5: Solve for x
    x = 128,079,347.74/13,069.51
  6. Step 6: Final answer
    x = 9,799.86

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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.