Home / 15,421.80-23,100.30-12,829.80

Finding the Fourth Proportional to 15,421.80, 23,100.30 and 12,829.80

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Solution

The fourth proportional to 15,421.80, 23,100.30 and 12,829.80 is: 19,217.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421.80 : 23,100.30 = 12,829.80 : x
  2. Step 2: Convert to fraction form
    15,421.80/23,100.30 = 12,829.80/x
  3. Step 3: Cross multiply
    15,421.80x = 23,100.30 × 12,829.80
  4. Step 4: Simplify right side
    15,421.80x = 296,372,228.94
  5. Step 5: Solve for x
    x = 296,372,228.94/15,421.80
  6. Step 6: Final answer
    x = 19,217.75

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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.