Home / 12,869.46-17,767.88-9,879.34

Finding the Fourth Proportional to 12,869.46, 17,767.88 and 9,879.34

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Solution

The fourth proportional to 12,869.46, 17,767.88 and 9,879.34 is: 13,639.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,869.46 : 17,767.88 = 9,879.34 : x
  2. Step 2: Convert to fraction form
    12,869.46/17,767.88 = 9,879.34/x
  3. Step 3: Cross multiply
    12,869.46x = 17,767.88 × 9,879.34
  4. Step 4: Simplify right side
    12,869.46x = 175,534,927.60
  5. Step 5: Solve for x
    x = 175,534,927.60/12,869.46
  6. Step 6: Final answer
    x = 13,639.65

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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.