Home / 15,543.15-21,412.01-12,843.11

Finding the Fourth Proportional to 15,543.15, 21,412.01 and 12,843.11

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Solution

The fourth proportional to 15,543.15, 21,412.01 and 12,843.11 is: 17,692.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,543.15 : 21,412.01 = 12,843.11 : x
  2. Step 2: Convert to fraction form
    15,543.15/21,412.01 = 12,843.11/x
  3. Step 3: Cross multiply
    15,543.15x = 21,412.01 × 12,843.11
  4. Step 4: Simplify right side
    15,543.15x = 274,996,799.75
  5. Step 5: Solve for x
    x = 274,996,799.75/15,543.15
  6. Step 6: Final answer
    x = 17,692.48

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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.