Home / 20,416.90-28,178.40-12,463.74

Finding the Fourth Proportional to 20,416.90, 28,178.40 and 12,463.74

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Solution

The fourth proportional to 20,416.90, 28,178.40 and 12,463.74 is: 17,201.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,416.90 : 28,178.40 = 12,463.74 : x
  2. Step 2: Convert to fraction form
    20,416.90/28,178.40 = 12,463.74/x
  3. Step 3: Cross multiply
    20,416.90x = 28,178.40 × 12,463.74
  4. Step 4: Simplify right side
    20,416.90x = 351,208,251.22
  5. Step 5: Solve for x
    x = 351,208,251.22/20,416.90
  6. Step 6: Final answer
    x = 17,201.84

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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.