Home / 13,752.74-20,639.64-7,178.78

Finding the Fourth Proportional to 13,752.74, 20,639.64 and 7,178.78

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Solution

The fourth proportional to 13,752.74, 20,639.64 and 7,178.78 is: 10,773.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,752.74 : 20,639.64 = 7,178.78 : x
  2. Step 2: Convert to fraction form
    13,752.74/20,639.64 = 7,178.78/x
  3. Step 3: Cross multiply
    13,752.74x = 20,639.64 × 7,178.78
  4. Step 4: Simplify right side
    13,752.74x = 148,167,434.84
  5. Step 5: Solve for x
    x = 148,167,434.84/13,752.74
  6. Step 6: Final answer
    x = 10,773.67

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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.