Home / 20,996.16-28,973.28-11,565.12

Finding the Fourth Proportional to 20,996.16, 28,973.28 and 11,565.12

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Solution

The fourth proportional to 20,996.16, 28,973.28 and 11,565.12 is: 15,959.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.16 : 28,973.28 = 11,565.12 : x
  2. Step 2: Convert to fraction form
    20,996.16/28,973.28 = 11,565.12/x
  3. Step 3: Cross multiply
    20,996.16x = 28,973.28 × 11,565.12
  4. Step 4: Simplify right side
    20,996.16x = 335,079,459.99
  5. Step 5: Solve for x
    x = 335,079,459.99/20,996.16
  6. Step 6: Final answer
    x = 15,959.08

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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.