Home / 20,267.31-27,968.40-11,315.64

Finding the Fourth Proportional to 20,267.31, 27,968.40 and 11,315.64

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Solution

The fourth proportional to 20,267.31, 27,968.40 and 11,315.64 is: 15,615.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,267.31 : 27,968.40 = 11,315.64 : x
  2. Step 2: Convert to fraction form
    20,267.31/27,968.40 = 11,315.64/x
  3. Step 3: Cross multiply
    20,267.31x = 27,968.40 × 11,315.64
  4. Step 4: Simplify right side
    20,267.31x = 316,480,345.78
  5. Step 5: Solve for x
    x = 316,480,345.78/20,267.31
  6. Step 6: Final answer
    x = 15,615.31

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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.