Home / 20,543.51-30,888.62-18,919.66

Finding the Fourth Proportional to 20,543.51, 30,888.62 and 18,919.66

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Solution

The fourth proportional to 20,543.51, 30,888.62 and 18,919.66 is: 28,447.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.51 : 30,888.62 = 18,919.66 : x
  2. Step 2: Convert to fraction form
    20,543.51/30,888.62 = 18,919.66/x
  3. Step 3: Cross multiply
    20,543.51x = 30,888.62 × 18,919.66
  4. Step 4: Simplify right side
    20,543.51x = 584,402,092.10
  5. Step 5: Solve for x
    x = 584,402,092.10/20,543.51
  6. Step 6: Final answer
    x = 28,447.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.