Home / 15,439.63-21,304.25-8,980.69

Finding the Fourth Proportional to 15,439.63, 21,304.25 and 8,980.69

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Solution

The fourth proportional to 15,439.63, 21,304.25 and 8,980.69 is: 12,391.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,439.63 : 21,304.25 = 8,980.69 : x
  2. Step 2: Convert to fraction form
    15,439.63/21,304.25 = 8,980.69/x
  3. Step 3: Cross multiply
    15,439.63x = 21,304.25 × 8,980.69
  4. Step 4: Simplify right side
    15,439.63x = 191,326,930.85
  5. Step 5: Solve for x
    x = 191,326,930.85/15,439.63
  6. Step 6: Final answer
    x = 12,391.94

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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.