Home / 28,130.78-42,205.40-11,504.79

Finding the Fourth Proportional to 28,130.78, 42,205.40 and 11,504.79

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Solution

The fourth proportional to 28,130.78, 42,205.40 and 11,504.79 is: 17,260.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,130.78 : 42,205.40 = 11,504.79 : x
  2. Step 2: Convert to fraction form
    28,130.78/42,205.40 = 11,504.79/x
  3. Step 3: Cross multiply
    28,130.78x = 42,205.40 × 11,504.79
  4. Step 4: Simplify right side
    28,130.78x = 485,564,263.87
  5. Step 5: Solve for x
    x = 485,564,263.87/28,130.78
  6. Step 6: Final answer
    x = 17,260.96

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1.5x scale

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.