Home / 20,985.47-28,959.89-11,554.03

Finding the Fourth Proportional to 20,985.47, 28,959.89 and 11,554.03

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Solution

The fourth proportional to 20,985.47, 28,959.89 and 11,554.03 is: 15,944.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.47 : 28,959.89 = 11,554.03 : x
  2. Step 2: Convert to fraction form
    20,985.47/28,959.89 = 11,554.03/x
  3. Step 3: Cross multiply
    20,985.47x = 28,959.89 × 11,554.03
  4. Step 4: Simplify right side
    20,985.47x = 334,603,437.86
  5. Step 5: Solve for x
    x = 334,603,437.86/20,985.47
  6. Step 6: Final answer
    x = 15,944.53

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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.