Home / 15,200.45-20,986.23-10,428.38

Finding the Fourth Proportional to 15,200.45, 20,986.23 and 10,428.38

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Solution

The fourth proportional to 15,200.45, 20,986.23 and 10,428.38 is: 14,397.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,200.45 : 20,986.23 = 10,428.38 : x
  2. Step 2: Convert to fraction form
    15,200.45/20,986.23 = 10,428.38/x
  3. Step 3: Cross multiply
    15,200.45x = 20,986.23 × 10,428.38
  4. Step 4: Simplify right side
    15,200.45x = 218,852,381.21
  5. Step 5: Solve for x
    x = 218,852,381.21/15,200.45
  6. Step 6: Final answer
    x = 14,397.76

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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.