Home / 9,131.40-13,670.64-5,645.16

Finding the Fourth Proportional to 9,131.40, 13,670.64 and 5,645.16

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Solution

The fourth proportional to 9,131.40, 13,670.64 and 5,645.16 is: 8,451.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,131.40 : 13,670.64 = 5,645.16 : x
  2. Step 2: Convert to fraction form
    9,131.40/13,670.64 = 5,645.16/x
  3. Step 3: Cross multiply
    9,131.40x = 13,670.64 × 5,645.16
  4. Step 4: Simplify right side
    9,131.40x = 77,172,950.10
  5. Step 5: Solve for x
    x = 77,172,950.10/9,131.40
  6. Step 6: Final answer
    x = 8,451.38

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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.