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Finding the Fourth Proportional to 15,100.21, 20,830.08 and 9,639.08

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Solution

The fourth proportional to 15,100.21, 20,830.08 and 9,639.08 is: 13,296.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,100.21 : 20,830.08 = 9,639.08 : x
  2. Step 2: Convert to fraction form
    15,100.21/20,830.08 = 9,639.08/x
  3. Step 3: Cross multiply
    15,100.21x = 20,830.08 × 9,639.08
  4. Step 4: Simplify right side
    15,100.21x = 200,782,807.53
  5. Step 5: Solve for x
    x = 200,782,807.53/15,100.21
  6. Step 6: Final answer
    x = 13,296.69

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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.