Home / 21,106.50-31,665.08-6,315.36

Finding the Fourth Proportional to 21,106.50, 31,665.08 and 6,315.36

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Solution

The fourth proportional to 21,106.50, 31,665.08 and 6,315.36 is: 9,474.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.50 : 31,665.08 = 6,315.36 : x
  2. Step 2: Convert to fraction form
    21,106.50/31,665.08 = 6,315.36/x
  3. Step 3: Cross multiply
    21,106.50x = 31,665.08 × 6,315.36
  4. Step 4: Simplify right side
    21,106.50x = 199,976,379.63
  5. Step 5: Solve for x
    x = 199,976,379.63/21,106.50
  6. Step 6: Final answer
    x = 9,474.63

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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.