Home / 20,784.48-28,683.20-12,827.04

Finding the Fourth Proportional to 20,784.48, 28,683.20 and 12,827.04

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Solution

The fourth proportional to 20,784.48, 28,683.20 and 12,827.04 is: 17,701.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.48 : 28,683.20 = 12,827.04 : x
  2. Step 2: Convert to fraction form
    20,784.48/28,683.20 = 12,827.04/x
  3. Step 3: Cross multiply
    20,784.48x = 28,683.20 × 12,827.04
  4. Step 4: Simplify right side
    20,784.48x = 367,920,553.73
  5. Step 5: Solve for x
    x = 367,920,553.73/20,784.48
  6. Step 6: Final answer
    x = 17,701.70

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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.