Home / 18,585.72-25,631.28-12,209.78

Finding the Fourth Proportional to 18,585.72, 25,631.28 and 12,209.78

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Solution

The fourth proportional to 18,585.72, 25,631.28 and 12,209.78 is: 16,838.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,585.72 : 25,631.28 = 12,209.78 : x
  2. Step 2: Convert to fraction form
    18,585.72/25,631.28 = 12,209.78/x
  3. Step 3: Cross multiply
    18,585.72x = 25,631.28 × 12,209.78
  4. Step 4: Simplify right side
    18,585.72x = 312,952,100.71
  5. Step 5: Solve for x
    x = 312,952,100.71/18,585.72
  6. Step 6: Final answer
    x = 16,838.31

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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.