Home / 15,295.26-21,119.39-9,920.25

Finding the Fourth Proportional to 15,295.26, 21,119.39 and 9,920.25

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Solution

The fourth proportional to 15,295.26, 21,119.39 and 9,920.25 is: 13,697.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,295.26 : 21,119.39 = 9,920.25 : x
  2. Step 2: Convert to fraction form
    15,295.26/21,119.39 = 9,920.25/x
  3. Step 3: Cross multiply
    15,295.26x = 21,119.39 × 9,920.25
  4. Step 4: Simplify right side
    15,295.26x = 209,509,628.65
  5. Step 5: Solve for x
    x = 209,509,628.65/15,295.26
  6. Step 6: Final answer
    x = 13,697.68

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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.