Home / 20,384.88-28,130.76-11,432.34

Finding the Fourth Proportional to 20,384.88, 28,130.76 and 11,432.34

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Solution

The fourth proportional to 20,384.88, 28,130.76 and 11,432.34 is: 15,776.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.88 : 28,130.76 = 11,432.34 : x
  2. Step 2: Convert to fraction form
    20,384.88/28,130.76 = 11,432.34/x
  3. Step 3: Cross multiply
    20,384.88x = 28,130.76 × 11,432.34
  4. Step 4: Simplify right side
    20,384.88x = 321,600,412.78
  5. Step 5: Solve for x
    x = 321,600,412.78/20,384.88
  6. Step 6: Final answer
    x = 15,776.42

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Half scale
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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.