Home / 20,308.78-28,026.30-11,356.81

Finding the Fourth Proportional to 20,308.78, 28,026.30 and 11,356.81

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Solution

The fourth proportional to 20,308.78, 28,026.30 and 11,356.81 is: 15,672.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,308.78 : 28,026.30 = 11,356.81 : x
  2. Step 2: Convert to fraction form
    20,308.78/28,026.30 = 11,356.81/x
  3. Step 3: Cross multiply
    20,308.78x = 28,026.30 × 11,356.81
  4. Step 4: Simplify right side
    20,308.78x = 318,289,364.10
  5. Step 5: Solve for x
    x = 318,289,364.10/20,308.78
  6. Step 6: Final answer
    x = 15,672.50

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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.