Home / 15,450.76-21,310.72-10,143.64

Finding the Fourth Proportional to 15,450.76, 21,310.72 and 10,143.64

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Solution

The fourth proportional to 15,450.76, 21,310.72 and 10,143.64 is: 13,990.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,450.76 : 21,310.72 = 10,143.64 : x
  2. Step 2: Convert to fraction form
    15,450.76/21,310.72 = 10,143.64/x
  3. Step 3: Cross multiply
    15,450.76x = 21,310.72 × 10,143.64
  4. Step 4: Simplify right side
    15,450.76x = 216,168,271.82
  5. Step 5: Solve for x
    x = 216,168,271.82/15,450.76
  6. Step 6: Final answer
    x = 13,990.79

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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.