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Finding the Fourth Proportional to 15,145.44, 20,918.20 and 10,100.89

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Solution

The fourth proportional to 15,145.44, 20,918.20 and 10,100.89 is: 13,950.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,145.44 : 20,918.20 = 10,100.89 : x
  2. Step 2: Convert to fraction form
    15,145.44/20,918.20 = 10,100.89/x
  3. Step 3: Cross multiply
    15,145.44x = 20,918.20 × 10,100.89
  4. Step 4: Simplify right side
    15,145.44x = 211,292,417.81
  5. Step 5: Solve for x
    x = 211,292,417.81/15,145.44
  6. Step 6: Final answer
    x = 13,950.90

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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.