Home / 12,405.28-17,117.76-7,369.60

Finding the Fourth Proportional to 12,405.28, 17,117.76 and 7,369.60

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Solution

The fourth proportional to 12,405.28, 17,117.76 and 7,369.60 is: 10,169.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.28 : 17,117.76 = 7,369.60 : x
  2. Step 2: Convert to fraction form
    12,405.28/17,117.76 = 7,369.60/x
  3. Step 3: Cross multiply
    12,405.28x = 17,117.76 × 7,369.60
  4. Step 4: Simplify right side
    12,405.28x = 126,151,044.10
  5. Step 5: Solve for x
    x = 126,151,044.10/12,405.28
  6. Step 6: Final answer
    x = 10,169.14

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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.