Home / 30,966.22-42,751.11-20,386.62

Finding the Fourth Proportional to 30,966.22, 42,751.11 and 20,386.62

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Solution

The fourth proportional to 30,966.22, 42,751.11 and 20,386.62 is: 28,145.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,966.22 : 42,751.11 = 20,386.62 : x
  2. Step 2: Convert to fraction form
    30,966.22/42,751.11 = 20,386.62/x
  3. Step 3: Cross multiply
    30,966.22x = 42,751.11 × 20,386.62
  4. Step 4: Simplify right side
    30,966.22x = 871,550,634.15
  5. Step 5: Solve for x
    x = 871,550,634.15/30,966.22
  6. Step 6: Final answer
    x = 28,145.21

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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.