Home / 12,409.20-17,122.32-7,030.80

Finding the Fourth Proportional to 12,409.20, 17,122.32 and 7,030.80

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Solution

The fourth proportional to 12,409.20, 17,122.32 and 7,030.80 is: 9,701.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,409.20 : 17,122.32 = 7,030.80 : x
  2. Step 2: Convert to fraction form
    12,409.20/17,122.32 = 7,030.80/x
  3. Step 3: Cross multiply
    12,409.20x = 17,122.32 × 7,030.80
  4. Step 4: Simplify right side
    12,409.20x = 120,383,607.46
  5. Step 5: Solve for x
    x = 120,383,607.46/12,409.20
  6. Step 6: Final answer
    x = 9,701.16

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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.