Home / 8,715.14-12,028.75-5,360.78

Finding the Fourth Proportional to 8,715.14, 12,028.75 and 5,360.78

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Solution

The fourth proportional to 8,715.14, 12,028.75 and 5,360.78 is: 7,399.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,715.14 : 12,028.75 = 5,360.78 : x
  2. Step 2: Convert to fraction form
    8,715.14/12,028.75 = 5,360.78/x
  3. Step 3: Cross multiply
    8,715.14x = 12,028.75 × 5,360.78
  4. Step 4: Simplify right side
    8,715.14x = 64,483,482.43
  5. Step 5: Solve for x
    x = 64,483,482.43/8,715.14
  6. Step 6: Final answer
    x = 7,399.02

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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.