Home / 20,985.54-28,959.17-11,553.50

Finding the Fourth Proportional to 20,985.54, 28,959.17 and 11,553.50

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Solution

The fourth proportional to 20,985.54, 28,959.17 and 11,553.50 is: 15,943.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.54 : 28,959.17 = 11,553.50 : x
  2. Step 2: Convert to fraction form
    20,985.54/28,959.17 = 11,553.50/x
  3. Step 3: Cross multiply
    20,985.54x = 28,959.17 × 11,553.50
  4. Step 4: Simplify right side
    20,985.54x = 334,579,727.08
  5. Step 5: Solve for x
    x = 334,579,727.08/20,985.54
  6. Step 6: Final answer
    x = 15,943.34

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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.