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Finding the Fourth Proportional to 15,145.88, 20,918.81 and 10,101.33

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Solution

The fourth proportional to 15,145.88, 20,918.81 and 10,101.33 is: 13,951.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,145.88 : 20,918.81 = 10,101.33 : x
  2. Step 2: Convert to fraction form
    15,145.88/20,918.81 = 10,101.33/x
  3. Step 3: Cross multiply
    15,145.88x = 20,918.81 × 10,101.33
  4. Step 4: Simplify right side
    15,145.88x = 211,307,752.51
  5. Step 5: Solve for x
    x = 211,307,752.51/15,145.88
  6. Step 6: Final answer
    x = 13,951.51

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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.