Home / 13,220.69-18,243.83-7,555.95

Finding the Fourth Proportional to 13,220.69, 18,243.83 and 7,555.95

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Solution

The fourth proportional to 13,220.69, 18,243.83 and 7,555.95 is: 10,426.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.69 : 18,243.83 = 7,555.95 : x
  2. Step 2: Convert to fraction form
    13,220.69/18,243.83 = 7,555.95/x
  3. Step 3: Cross multiply
    13,220.69x = 18,243.83 × 7,555.95
  4. Step 4: Simplify right side
    13,220.69x = 137,849,486.18
  5. Step 5: Solve for x
    x = 137,849,486.18/13,220.69
  6. Step 6: Final answer
    x = 10,426.80

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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.