Home / 10,315.80-15,441.30-9,991.80

Finding the Fourth Proportional to 10,315.80, 15,441.30 and 9,991.80

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Solution

The fourth proportional to 10,315.80, 15,441.30 and 9,991.80 is: 14,956.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,315.80 : 15,441.30 = 9,991.80 : x
  2. Step 2: Convert to fraction form
    10,315.80/15,441.30 = 9,991.80/x
  3. Step 3: Cross multiply
    10,315.80x = 15,441.30 × 9,991.80
  4. Step 4: Simplify right side
    10,315.80x = 154,286,381.34
  5. Step 5: Solve for x
    x = 154,286,381.34/10,315.80
  6. Step 6: Final answer
    x = 14,956.32

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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.