Home / 30,825.72-42,495.30-20,736.36

Finding the Fourth Proportional to 30,825.72, 42,495.30 and 20,736.36

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Solution

The fourth proportional to 30,825.72, 42,495.30 and 20,736.36 is: 28,586.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,825.72 : 42,495.30 = 20,736.36 : x
  2. Step 2: Convert to fraction form
    30,825.72/42,495.30 = 20,736.36/x
  3. Step 3: Cross multiply
    30,825.72x = 42,495.30 × 20,736.36
  4. Step 4: Simplify right side
    30,825.72x = 881,197,839.11
  5. Step 5: Solve for x
    x = 881,197,839.11/30,825.72
  6. Step 6: Final answer
    x = 28,586.45

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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.