Home / 21,315.34-31,970.58-5,731.75

Finding the Fourth Proportional to 21,315.34, 31,970.58 and 5,731.75

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Solution

The fourth proportional to 21,315.34, 31,970.58 and 5,731.75 is: 8,596.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.34 : 31,970.58 = 5,731.75 : x
  2. Step 2: Convert to fraction form
    21,315.34/31,970.58 = 5,731.75/x
  3. Step 3: Cross multiply
    21,315.34x = 31,970.58 × 5,731.75
  4. Step 4: Simplify right side
    21,315.34x = 183,247,371.92
  5. Step 5: Solve for x
    x = 183,247,371.92/21,315.34
  6. Step 6: Final answer
    x = 8,596.97

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1.5x scale

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.