Home / 20,985.89-28,960.47-11,554.46

Finding the Fourth Proportional to 20,985.89, 28,960.47 and 11,554.46

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Solution

The fourth proportional to 20,985.89, 28,960.47 and 11,554.46 is: 15,945.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.89 : 28,960.47 = 11,554.46 : x
  2. Step 2: Convert to fraction form
    20,985.89/28,960.47 = 11,554.46/x
  3. Step 3: Cross multiply
    20,985.89x = 28,960.47 × 11,554.46
  4. Step 4: Simplify right side
    20,985.89x = 334,622,476.28
  5. Step 5: Solve for x
    x = 334,622,476.28/20,985.89
  6. Step 6: Final answer
    x = 15,945.12

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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.