Home / 10,455.40-15,670.68-5,187.16

Finding the Fourth Proportional to 10,455.40, 15,670.68 and 5,187.16

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Solution

The fourth proportional to 10,455.40, 15,670.68 and 5,187.16 is: 7,774.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,455.40 : 15,670.68 = 5,187.16 : x
  2. Step 2: Convert to fraction form
    10,455.40/15,670.68 = 5,187.16/x
  3. Step 3: Cross multiply
    10,455.40x = 15,670.68 × 5,187.16
  4. Step 4: Simplify right side
    10,455.40x = 81,286,324.47
  5. Step 5: Solve for x
    x = 81,286,324.47/10,455.40
  6. Step 6: Final answer
    x = 7,774.58

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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.