Home / 20,020.74-27,639.87-13,315.50

Finding the Fourth Proportional to 20,020.74, 27,639.87 and 13,315.50

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Solution

The fourth proportional to 20,020.74, 27,639.87 and 13,315.50 is: 18,382.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,020.74 : 27,639.87 = 13,315.50 : x
  2. Step 2: Convert to fraction form
    20,020.74/27,639.87 = 13,315.50/x
  3. Step 3: Cross multiply
    20,020.74x = 27,639.87 × 13,315.50
  4. Step 4: Simplify right side
    20,020.74x = 368,038,688.99
  5. Step 5: Solve for x
    x = 368,038,688.99/20,020.74
  6. Step 6: Final answer
    x = 18,382.87

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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.