Home / 10,866.48-14,990.67-6,390.15

Finding the Fourth Proportional to 10,866.48, 14,990.67 and 6,390.15

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Solution

The fourth proportional to 10,866.48, 14,990.67 and 6,390.15 is: 8,815.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,866.48 : 14,990.67 = 6,390.15 : x
  2. Step 2: Convert to fraction form
    10,866.48/14,990.67 = 6,390.15/x
  3. Step 3: Cross multiply
    10,866.48x = 14,990.67 × 6,390.15
  4. Step 4: Simplify right side
    10,866.48x = 95,792,629.90
  5. Step 5: Solve for x
    x = 95,792,629.90/10,866.48
  6. Step 6: Final answer
    x = 8,815.42

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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.