Home / 26,378.70-39,510.45-20,489.10

Finding the Fourth Proportional to 26,378.70, 39,510.45 and 20,489.10

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Solution

The fourth proportional to 26,378.70, 39,510.45 and 20,489.10 is: 30,688.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,378.70 : 39,510.45 = 20,489.10 : x
  2. Step 2: Convert to fraction form
    26,378.70/39,510.45 = 20,489.10/x
  3. Step 3: Cross multiply
    26,378.70x = 39,510.45 × 20,489.10
  4. Step 4: Simplify right side
    26,378.70x = 809,533,561.10
  5. Step 5: Solve for x
    x = 809,533,561.10/26,378.70
  6. Step 6: Final answer
    x = 30,688.91

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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.