Home / 21,315.16-31,968.87-5,729.14

Finding the Fourth Proportional to 21,315.16, 31,968.87 and 5,729.14

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Solution

The fourth proportional to 21,315.16, 31,968.87 and 5,729.14 is: 8,592.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.16 : 31,968.87 = 5,729.14 : x
  2. Step 2: Convert to fraction form
    21,315.16/31,968.87 = 5,729.14/x
  3. Step 3: Cross multiply
    21,315.16x = 31,968.87 × 5,729.14
  4. Step 4: Simplify right side
    21,315.16x = 183,154,131.87
  5. Step 5: Solve for x
    x = 183,154,131.87/21,315.16
  6. Step 6: Final answer
    x = 8,592.67

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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.