Home / 30,122.96-45,089.71-20,707.91

Finding the Fourth Proportional to 30,122.96, 45,089.71 and 20,707.91

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Solution

The fourth proportional to 30,122.96, 45,089.71 and 20,707.91 is: 30,996.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,122.96 : 45,089.71 = 20,707.91 : x
  2. Step 2: Convert to fraction form
    30,122.96/45,089.71 = 20,707.91/x
  3. Step 3: Cross multiply
    30,122.96x = 45,089.71 × 20,707.91
  4. Step 4: Simplify right side
    30,122.96x = 933,713,656.61
  5. Step 5: Solve for x
    x = 933,713,656.61/30,122.96
  6. Step 6: Final answer
    x = 30,996.74

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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.