Home / 15,376.32-21,195-10,890.36

Finding the Fourth Proportional to 15,376.32, 21,195 and 10,890.36

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Solution

The fourth proportional to 15,376.32, 21,195 and 10,890.36 is: 15,011.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,376.32 : 21,195 = 10,890.36 : x
  2. Step 2: Convert to fraction form
    15,376.32/21,195 = 10,890.36/x
  3. Step 3: Cross multiply
    15,376.32x = 21,195 × 10,890.36
  4. Step 4: Simplify right side
    15,376.32x = 230,821,180.20
  5. Step 5: Solve for x
    x = 230,821,180.20/15,376.32
  6. Step 6: Final answer
    x = 15,011.47

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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.