Home / 11,139.12-15,336.92-9,457.20

Finding the Fourth Proportional to 11,139.12, 15,336.92 and 9,457.20

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Solution

The fourth proportional to 11,139.12, 15,336.92 and 9,457.20 is: 13,021.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.12 : 15,336.92 = 9,457.20 : x
  2. Step 2: Convert to fraction form
    11,139.12/15,336.92 = 9,457.20/x
  3. Step 3: Cross multiply
    11,139.12x = 15,336.92 × 9,457.20
  4. Step 4: Simplify right side
    11,139.12x = 145,044,319.82
  5. Step 5: Solve for x
    x = 145,044,319.82/11,139.12
  6. Step 6: Final answer
    x = 13,021.17

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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.