Home / 20,666.18-28,519.59-12,168.32

Finding the Fourth Proportional to 20,666.18, 28,519.59 and 12,168.32

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Solution

The fourth proportional to 20,666.18, 28,519.59 and 12,168.32 is: 16,792.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.18 : 28,519.59 = 12,168.32 : x
  2. Step 2: Convert to fraction form
    20,666.18/28,519.59 = 12,168.32/x
  3. Step 3: Cross multiply
    20,666.18x = 28,519.59 × 12,168.32
  4. Step 4: Simplify right side
    20,666.18x = 347,035,354.79
  5. Step 5: Solve for x
    x = 347,035,354.79/20,666.18
  6. Step 6: Final answer
    x = 16,792.43

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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.