Home / 20,393.61-28,143.45-11,440.58

Finding the Fourth Proportional to 20,393.61, 28,143.45 and 11,440.58

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Solution

The fourth proportional to 20,393.61, 28,143.45 and 11,440.58 is: 15,788.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.61 : 28,143.45 = 11,440.58 : x
  2. Step 2: Convert to fraction form
    20,393.61/28,143.45 = 11,440.58/x
  3. Step 3: Cross multiply
    20,393.61x = 28,143.45 × 11,440.58
  4. Step 4: Simplify right side
    20,393.61x = 321,977,250.48
  5. Step 5: Solve for x
    x = 321,977,250.48/20,393.61
  6. Step 6: Final answer
    x = 15,788.15

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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.