Home / 26,640.05-39,960.07-7,920.01

Finding the Fourth Proportional to 26,640.05, 39,960.07 and 7,920.01

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Solution

The fourth proportional to 26,640.05, 39,960.07 and 7,920.01 is: 11,880.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,640.05 : 39,960.07 = 7,920.01 : x
  2. Step 2: Convert to fraction form
    26,640.05/39,960.07 = 7,920.01/x
  3. Step 3: Cross multiply
    26,640.05x = 39,960.07 × 7,920.01
  4. Step 4: Simplify right side
    26,640.05x = 316,484,034.30
  5. Step 5: Solve for x
    x = 316,484,034.30/26,640.05
  6. Step 6: Final answer
    x = 11,880.01

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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.