Home / 30,528.16-42,133.94-20,960.22

Finding the Fourth Proportional to 30,528.16, 42,133.94 and 20,960.22

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Solution

The fourth proportional to 30,528.16, 42,133.94 and 20,960.22 is: 28,928.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,528.16 : 42,133.94 = 20,960.22 : x
  2. Step 2: Convert to fraction form
    30,528.16/42,133.94 = 20,960.22/x
  3. Step 3: Cross multiply
    30,528.16x = 42,133.94 × 20,960.22
  4. Step 4: Simplify right side
    30,528.16x = 883,136,651.87
  5. Step 5: Solve for x
    x = 883,136,651.87/30,528.16
  6. Step 6: Final answer
    x = 28,928.59

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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.