Home / 12,639.24-18,970.50-6,403.59

Finding the Fourth Proportional to 12,639.24, 18,970.50 and 6,403.59

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Solution

The fourth proportional to 12,639.24, 18,970.50 and 6,403.59 is: 9,611.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.24 : 18,970.50 = 6,403.59 : x
  2. Step 2: Convert to fraction form
    12,639.24/18,970.50 = 6,403.59/x
  3. Step 3: Cross multiply
    12,639.24x = 18,970.50 × 6,403.59
  4. Step 4: Simplify right side
    12,639.24x = 121,479,304.10
  5. Step 5: Solve for x
    x = 121,479,304.10/12,639.24
  6. Step 6: Final answer
    x = 9,611.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.