Home / 20,985.34-28,959.06-11,425.04

Finding the Fourth Proportional to 20,985.34, 28,959.06 and 11,425.04

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Solution

The fourth proportional to 20,985.34, 28,959.06 and 11,425.04 is: 15,766.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.34 : 28,959.06 = 11,425.04 : x
  2. Step 2: Convert to fraction form
    20,985.34/28,959.06 = 11,425.04/x
  3. Step 3: Cross multiply
    20,985.34x = 28,959.06 × 11,425.04
  4. Step 4: Simplify right side
    20,985.34x = 330,858,491.26
  5. Step 5: Solve for x
    x = 330,858,491.26/20,985.34
  6. Step 6: Final answer
    x = 15,766.17

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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.