Home / 20,968.16-28,935.76-11,407.92

Finding the Fourth Proportional to 20,968.16, 28,935.76 and 11,407.92

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Solution

The fourth proportional to 20,968.16, 28,935.76 and 11,407.92 is: 15,742.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.16 : 28,935.76 = 11,407.92 : x
  2. Step 2: Convert to fraction form
    20,968.16/28,935.76 = 11,407.92/x
  3. Step 3: Cross multiply
    20,968.16x = 28,935.76 × 11,407.92
  4. Step 4: Simplify right side
    20,968.16x = 330,096,835.22
  5. Step 5: Solve for x
    x = 330,096,835.22/20,968.16
  6. Step 6: Final answer
    x = 15,742.77

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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.