Home / 20,384.60-28,130.79-11,892.56

Finding the Fourth Proportional to 20,384.60, 28,130.79 and 11,892.56

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Solution

The fourth proportional to 20,384.60, 28,130.79 and 11,892.56 is: 16,411.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.60 : 28,130.79 = 11,892.56 : x
  2. Step 2: Convert to fraction form
    20,384.60/28,130.79 = 11,892.56/x
  3. Step 3: Cross multiply
    20,384.60x = 28,130.79 × 11,892.56
  4. Step 4: Simplify right side
    20,384.60x = 334,546,967.27
  5. Step 5: Solve for x
    x = 334,546,967.27/20,384.60
  6. Step 6: Final answer
    x = 16,411.75

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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.