Home / 15,777.80-23,637.90-12,840.20

Finding the Fourth Proportional to 15,777.80, 23,637.90 and 12,840.20

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Solution

The fourth proportional to 15,777.80, 23,637.90 and 12,840.20 is: 19,236.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,777.80 : 23,637.90 = 12,840.20 : x
  2. Step 2: Convert to fraction form
    15,777.80/23,637.90 = 12,840.20/x
  3. Step 3: Cross multiply
    15,777.80x = 23,637.90 × 12,840.20
  4. Step 4: Simplify right side
    15,777.80x = 303,515,363.58
  5. Step 5: Solve for x
    x = 303,515,363.58/15,777.80
  6. Step 6: Final answer
    x = 19,236.86

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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.