Home / 26,921.61-40,390.61-13,783.20

Finding the Fourth Proportional to 26,921.61, 40,390.61 and 13,783.20

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Solution

The fourth proportional to 26,921.61, 40,390.61 and 13,783.20 is: 20,678.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,921.61 : 40,390.61 = 13,783.20 : x
  2. Step 2: Convert to fraction form
    26,921.61/40,390.61 = 13,783.20/x
  3. Step 3: Cross multiply
    26,921.61x = 40,390.61 × 13,783.20
  4. Step 4: Simplify right side
    26,921.61x = 556,711,786.84
  5. Step 5: Solve for x
    x = 556,711,786.84/26,921.61
  6. Step 6: Final answer
    x = 20,678.99

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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.