Home / 18,618.32-25,698.12-12,328.40

Finding the Fourth Proportional to 18,618.32, 25,698.12 and 12,328.40

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Solution

The fourth proportional to 18,618.32, 25,698.12 and 12,328.40 is: 17,016.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,618.32 : 25,698.12 = 12,328.40 : x
  2. Step 2: Convert to fraction form
    18,618.32/25,698.12 = 12,328.40/x
  3. Step 3: Cross multiply
    18,618.32x = 25,698.12 × 12,328.40
  4. Step 4: Simplify right side
    18,618.32x = 316,816,702.61
  5. Step 5: Solve for x
    x = 316,816,702.61/18,618.32
  6. Step 6: Final answer
    x = 17,016.40

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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.