Home / 20,193.57-30,280.30-12,792.40

Finding the Fourth Proportional to 20,193.57, 30,280.30 and 12,792.40

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Solution

The fourth proportional to 20,193.57, 30,280.30 and 12,792.40 is: 19,182.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,193.57 : 30,280.30 = 12,792.40 : x
  2. Step 2: Convert to fraction form
    20,193.57/30,280.30 = 12,792.40/x
  3. Step 3: Cross multiply
    20,193.57x = 30,280.30 × 12,792.40
  4. Step 4: Simplify right side
    20,193.57x = 387,357,602.04
  5. Step 5: Solve for x
    x = 387,357,602.04/20,193.57
  6. Step 6: Final answer
    x = 19,182.22

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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.