Home / 13,639.94-18,821.65-7,670.34

Finding the Fourth Proportional to 13,639.94, 18,821.65 and 7,670.34

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Solution

The fourth proportional to 13,639.94, 18,821.65 and 7,670.34 is: 10,584.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.94 : 18,821.65 = 7,670.34 : x
  2. Step 2: Convert to fraction form
    13,639.94/18,821.65 = 7,670.34/x
  3. Step 3: Cross multiply
    13,639.94x = 18,821.65 × 7,670.34
  4. Step 4: Simplify right side
    13,639.94x = 144,368,416.51
  5. Step 5: Solve for x
    x = 144,368,416.51/13,639.94
  6. Step 6: Final answer
    x = 10,584.24

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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.