Home / 20,698.02-28,569.78-12,199.68

Finding the Fourth Proportional to 20,698.02, 28,569.78 and 12,199.68

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Solution

The fourth proportional to 20,698.02, 28,569.78 and 12,199.68 is: 16,839.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698.02 : 28,569.78 = 12,199.68 : x
  2. Step 2: Convert to fraction form
    20,698.02/28,569.78 = 12,199.68/x
  3. Step 3: Cross multiply
    20,698.02x = 28,569.78 × 12,199.68
  4. Step 4: Simplify right side
    20,698.02x = 348,542,173.67
  5. Step 5: Solve for x
    x = 348,542,173.67/20,698.02
  6. Step 6: Final answer
    x = 16,839.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.