Home / 13,422.69-18,532.58-8,389.17

Finding the Fourth Proportional to 13,422.69, 18,532.58 and 8,389.17

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Solution

The fourth proportional to 13,422.69, 18,532.58 and 8,389.17 is: 11,582.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,422.69 : 18,532.58 = 8,389.17 : x
  2. Step 2: Convert to fraction form
    13,422.69/18,532.58 = 8,389.17/x
  3. Step 3: Cross multiply
    13,422.69x = 18,532.58 × 8,389.17
  4. Step 4: Simplify right side
    13,422.69x = 155,472,964.16
  5. Step 5: Solve for x
    x = 155,472,964.16/13,422.69
  6. Step 6: Final answer
    x = 11,582.85

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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.