Home / 21,060.05-31,574.51-12,738.06

Finding the Fourth Proportional to 21,060.05, 31,574.51 and 12,738.06

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Solution

The fourth proportional to 21,060.05, 31,574.51 and 12,738.06 is: 19,097.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,060.05 : 31,574.51 = 12,738.06 : x
  2. Step 2: Convert to fraction form
    21,060.05/31,574.51 = 12,738.06/x
  3. Step 3: Cross multiply
    21,060.05x = 31,574.51 × 12,738.06
  4. Step 4: Simplify right side
    21,060.05x = 402,197,986.93
  5. Step 5: Solve for x
    x = 402,197,986.93/21,060.05
  6. Step 6: Final answer
    x = 19,097.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.