Home / 13,505.69-18,639.54-7,839.23

Finding the Fourth Proportional to 13,505.69, 18,639.54 and 7,839.23

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Solution

The fourth proportional to 13,505.69, 18,639.54 and 7,839.23 is: 10,819.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,505.69 : 18,639.54 = 7,839.23 : x
  2. Step 2: Convert to fraction form
    13,505.69/18,639.54 = 7,839.23/x
  3. Step 3: Cross multiply
    13,505.69x = 18,639.54 × 7,839.23
  4. Step 4: Simplify right side
    13,505.69x = 146,119,641.15
  5. Step 5: Solve for x
    x = 146,119,641.15/13,505.69
  6. Step 6: Final answer
    x = 10,819.12

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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.