Home / 12,120.81-16,706.16-9,248.55

Finding the Fourth Proportional to 12,120.81, 16,706.16 and 9,248.55

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Solution

The fourth proportional to 12,120.81, 16,706.16 and 9,248.55 is: 12,747.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.81 : 16,706.16 = 9,248.55 : x
  2. Step 2: Convert to fraction form
    12,120.81/16,706.16 = 9,248.55/x
  3. Step 3: Cross multiply
    12,120.81x = 16,706.16 × 9,248.55
  4. Step 4: Simplify right side
    12,120.81x = 154,507,756.07
  5. Step 5: Solve for x
    x = 154,507,756.07/12,120.81
  6. Step 6: Final answer
    x = 12,747.31

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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.