Home / 20,985.01-28,959.28-11,553.57

Finding the Fourth Proportional to 20,985.01, 28,959.28 and 11,553.57

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Solution

The fourth proportional to 20,985.01, 28,959.28 and 11,553.57 is: 15,943.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.01 : 28,959.28 = 11,553.57 : x
  2. Step 2: Convert to fraction form
    20,985.01/28,959.28 = 11,553.57/x
  3. Step 3: Cross multiply
    20,985.01x = 28,959.28 × 11,553.57
  4. Step 4: Simplify right side
    20,985.01x = 334,583,039.75
  5. Step 5: Solve for x
    x = 334,583,039.75/20,985.01
  6. Step 6: Final answer
    x = 15,943.91

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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.