Home / 20,543.10-28,347.30-15,168.36

Finding the Fourth Proportional to 20,543.10, 28,347.30 and 15,168.36

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Solution

The fourth proportional to 20,543.10, 28,347.30 and 15,168.36 is: 20,930.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.10 : 28,347.30 = 15,168.36 : x
  2. Step 2: Convert to fraction form
    20,543.10/28,347.30 = 15,168.36/x
  3. Step 3: Cross multiply
    20,543.10x = 28,347.30 × 15,168.36
  4. Step 4: Simplify right side
    20,543.10x = 429,982,051.43
  5. Step 5: Solve for x
    x = 429,982,051.43/20,543.10
  6. Step 6: Final answer
    x = 20,930.73

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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.