Home / 38,940.40-58,412.67-12,643.21

Finding the Fourth Proportional to 38,940.40, 58,412.67 and 12,643.21

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Solution

The fourth proportional to 38,940.40, 58,412.67 and 12,643.21 is: 18,965.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,940.40 : 58,412.67 = 12,643.21 : x
  2. Step 2: Convert to fraction form
    38,940.40/58,412.67 = 12,643.21/x
  3. Step 3: Cross multiply
    38,940.40x = 58,412.67 × 12,643.21
  4. Step 4: Simplify right side
    38,940.40x = 738,523,653.47
  5. Step 5: Solve for x
    x = 738,523,653.47/38,940.40
  6. Step 6: Final answer
    x = 18,965.49

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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.