Home / 15,315.56-21,143.50-10,306.12

Finding the Fourth Proportional to 15,315.56, 21,143.50 and 10,306.12

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Solution

The fourth proportional to 15,315.56, 21,143.50 and 10,306.12 is: 14,227.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,315.56 : 21,143.50 = 10,306.12 : x
  2. Step 2: Convert to fraction form
    15,315.56/21,143.50 = 10,306.12/x
  3. Step 3: Cross multiply
    15,315.56x = 21,143.50 × 10,306.12
  4. Step 4: Simplify right side
    15,315.56x = 217,907,448.22
  5. Step 5: Solve for x
    x = 217,907,448.22/15,315.56
  6. Step 6: Final answer
    x = 14,227.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.