Home / 30,260.91-45,397.89-12,720.63

Finding the Fourth Proportional to 30,260.91, 45,397.89 and 12,720.63

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Solution

The fourth proportional to 30,260.91, 45,397.89 and 12,720.63 is: 19,083.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,260.91 : 45,397.89 = 12,720.63 : x
  2. Step 2: Convert to fraction form
    30,260.91/45,397.89 = 12,720.63/x
  3. Step 3: Cross multiply
    30,260.91x = 45,397.89 × 12,720.63
  4. Step 4: Simplify right side
    30,260.91x = 577,489,761.47
  5. Step 5: Solve for x
    x = 577,489,761.47/30,260.91
  6. Step 6: Final answer
    x = 19,083.69

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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.