Home / 20,419.32-28,178.64-11,927.28

Finding the Fourth Proportional to 20,419.32, 28,178.64 and 11,927.28

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Solution

The fourth proportional to 20,419.32, 28,178.64 and 11,927.28 is: 16,459.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.32 : 28,178.64 = 11,927.28 : x
  2. Step 2: Convert to fraction form
    20,419.32/28,178.64 = 11,927.28/x
  3. Step 3: Cross multiply
    20,419.32x = 28,178.64 × 11,927.28
  4. Step 4: Simplify right side
    20,419.32x = 336,094,529.30
  5. Step 5: Solve for x
    x = 336,094,529.30/20,419.32
  6. Step 6: Final answer
    x = 16,459.63

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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.