Home / 20,923.28-28,875.54-11,491.94

Finding the Fourth Proportional to 20,923.28, 28,875.54 and 11,491.94

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Solution

The fourth proportional to 20,923.28, 28,875.54 and 11,491.94 is: 15,859.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.28 : 28,875.54 = 11,491.94 : x
  2. Step 2: Convert to fraction form
    20,923.28/28,875.54 = 11,491.94/x
  3. Step 3: Cross multiply
    20,923.28x = 28,875.54 × 11,491.94
  4. Step 4: Simplify right side
    20,923.28x = 331,835,973.15
  5. Step 5: Solve for x
    x = 331,835,973.15/20,923.28
  6. Step 6: Final answer
    x = 15,859.65

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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.