Home / 15,776.80-23,636.40-12,839.20

Finding the Fourth Proportional to 15,776.80, 23,636.40 and 12,839.20

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Solution

The fourth proportional to 15,776.80, 23,636.40 and 12,839.20 is: 19,235.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,776.80 : 23,636.40 = 12,839.20 : x
  2. Step 2: Convert to fraction form
    15,776.80/23,636.40 = 12,839.20/x
  3. Step 3: Cross multiply
    15,776.80x = 23,636.40 × 12,839.20
  4. Step 4: Simplify right side
    15,776.80x = 303,472,466.88
  5. Step 5: Solve for x
    x = 303,472,466.88/15,776.80
  6. Step 6: Final answer
    x = 19,235.36

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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.