Home / 13,390.93-18,479.63-7,422.71

Finding the Fourth Proportional to 13,390.93, 18,479.63 and 7,422.71

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Solution

The fourth proportional to 13,390.93, 18,479.63 and 7,422.71 is: 10,243.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.93 : 18,479.63 = 7,422.71 : x
  2. Step 2: Convert to fraction form
    13,390.93/18,479.63 = 7,422.71/x
  3. Step 3: Cross multiply
    13,390.93x = 18,479.63 × 7,422.71
  4. Step 4: Simplify right side
    13,390.93x = 137,168,934.40
  5. Step 5: Solve for x
    x = 137,168,934.40/13,390.93
  6. Step 6: Final answer
    x = 10,243.42

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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.