Home / 15,315.35-21,143.23-10,305.90

Finding the Fourth Proportional to 15,315.35, 21,143.23 and 10,305.90

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Solution

The fourth proportional to 15,315.35, 21,143.23 and 10,305.90 is: 14,227.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,315.35 : 21,143.23 = 10,305.90 : x
  2. Step 2: Convert to fraction form
    15,315.35/21,143.23 = 10,305.90/x
  3. Step 3: Cross multiply
    15,315.35x = 21,143.23 × 10,305.90
  4. Step 4: Simplify right side
    15,315.35x = 217,899,988.29
  5. Step 5: Solve for x
    x = 217,899,988.29/15,315.35
  6. Step 6: Final answer
    x = 14,227.56

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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.