Home / 13,639.86-20,457.52-3,780.14

Finding the Fourth Proportional to 13,639.86, 20,457.52 and 3,780.14

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Solution

The fourth proportional to 13,639.86, 20,457.52 and 3,780.14 is: 5,669.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.86 : 20,457.52 = 3,780.14 : x
  2. Step 2: Convert to fraction form
    13,639.86/20,457.52 = 3,780.14/x
  3. Step 3: Cross multiply
    13,639.86x = 20,457.52 × 3,780.14
  4. Step 4: Simplify right side
    13,639.86x = 77,332,254.63
  5. Step 5: Solve for x
    x = 77,332,254.63/13,639.86
  6. Step 6: Final answer
    x = 5,669.58

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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.