Home / 30,580.14-42,161.13-20,510.22

Finding the Fourth Proportional to 30,580.14, 42,161.13 and 20,510.22

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Solution

The fourth proportional to 30,580.14, 42,161.13 and 20,510.22 is: 28,277.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,580.14 : 42,161.13 = 20,510.22 : x
  2. Step 2: Convert to fraction form
    30,580.14/42,161.13 = 20,510.22/x
  3. Step 3: Cross multiply
    30,580.14x = 42,161.13 × 20,510.22
  4. Step 4: Simplify right side
    30,580.14x = 864,734,051.75
  5. Step 5: Solve for x
    x = 864,734,051.75/30,580.14
  6. Step 6: Final answer
    x = 28,277.64

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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.