Home / 12,640.70-18,960.35-3,875.59

Finding the Fourth Proportional to 12,640.70, 18,960.35 and 3,875.59

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Solution

The fourth proportional to 12,640.70, 18,960.35 and 3,875.59 is: 5,813.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.70 : 18,960.35 = 3,875.59 : x
  2. Step 2: Convert to fraction form
    12,640.70/18,960.35 = 3,875.59/x
  3. Step 3: Cross multiply
    12,640.70x = 18,960.35 × 3,875.59
  4. Step 4: Simplify right side
    12,640.70x = 73,482,547.18
  5. Step 5: Solve for x
    x = 73,482,547.18/12,640.70
  6. Step 6: Final answer
    x = 5,813.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.