Home / 30,528.05-42,153.03-20,329.02

Finding the Fourth Proportional to 30,528.05, 42,153.03 and 20,329.02

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Solution

The fourth proportional to 30,528.05, 42,153.03 and 20,329.02 is: 28,070.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,528.05 : 42,153.03 = 20,329.02 : x
  2. Step 2: Convert to fraction form
    30,528.05/42,153.03 = 20,329.02/x
  3. Step 3: Cross multiply
    30,528.05x = 42,153.03 × 20,329.02
  4. Step 4: Simplify right side
    30,528.05x = 856,929,789.93
  5. Step 5: Solve for x
    x = 856,929,789.93/30,528.05
  6. Step 6: Final answer
    x = 28,070.25

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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.