Home / 12,390.34-17,099.19-7,085.16

Finding the Fourth Proportional to 12,390.34, 17,099.19 and 7,085.16

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Solution

The fourth proportional to 12,390.34, 17,099.19 and 7,085.16 is: 9,777.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.34 : 17,099.19 = 7,085.16 : x
  2. Step 2: Convert to fraction form
    12,390.34/17,099.19 = 7,085.16/x
  3. Step 3: Cross multiply
    12,390.34x = 17,099.19 × 7,085.16
  4. Step 4: Simplify right side
    12,390.34x = 121,150,497.02
  5. Step 5: Solve for x
    x = 121,150,497.02/12,390.34
  6. Step 6: Final answer
    x = 9,777.82

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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.