Home / 12,639.42-17,435.79-9,650.07

Finding the Fourth Proportional to 12,639.42, 17,435.79 and 9,650.07

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Solution

The fourth proportional to 12,639.42, 17,435.79 and 9,650.07 is: 13,312.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.42 : 17,435.79 = 9,650.07 : x
  2. Step 2: Convert to fraction form
    12,639.42/17,435.79 = 9,650.07/x
  3. Step 3: Cross multiply
    12,639.42x = 17,435.79 × 9,650.07
  4. Step 4: Simplify right side
    12,639.42x = 168,256,594.01
  5. Step 5: Solve for x
    x = 168,256,594.01/12,639.42
  6. Step 6: Final answer
    x = 13,312.05

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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.