Home / 12,240.79-16,900.40-9,403.09

Finding the Fourth Proportional to 12,240.79, 16,900.40 and 9,403.09

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Solution

The fourth proportional to 12,240.79, 16,900.40 and 9,403.09 is: 12,982.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,240.79 : 16,900.40 = 9,403.09 : x
  2. Step 2: Convert to fraction form
    12,240.79/16,900.40 = 9,403.09/x
  3. Step 3: Cross multiply
    12,240.79x = 16,900.40 × 9,403.09
  4. Step 4: Simplify right side
    12,240.79x = 158,915,963.49
  5. Step 5: Solve for x
    x = 158,915,963.49/12,240.79
  6. Step 6: Final answer
    x = 12,982.50

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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.