Home / 20,300.85-28,023.81-12,345.63

Finding the Fourth Proportional to 20,300.85, 28,023.81 and 12,345.63

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Solution

The fourth proportional to 20,300.85, 28,023.81 and 12,345.63 is: 17,042.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,300.85 : 28,023.81 = 12,345.63 : x
  2. Step 2: Convert to fraction form
    20,300.85/28,023.81 = 12,345.63/x
  3. Step 3: Cross multiply
    20,300.85x = 28,023.81 × 12,345.63
  4. Step 4: Simplify right side
    20,300.85x = 345,971,589.45
  5. Step 5: Solve for x
    x = 345,971,589.45/20,300.85
  6. Step 6: Final answer
    x = 17,042.22

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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.