Home / 30,825.20-42,527.40-20,220.68

Finding the Fourth Proportional to 30,825.20, 42,527.40 and 20,220.68

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Solution

The fourth proportional to 30,825.20, 42,527.40 and 20,220.68 is: 27,897.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,825.20 : 42,527.40 = 20,220.68 : x
  2. Step 2: Convert to fraction form
    30,825.20/42,527.40 = 20,220.68/x
  3. Step 3: Cross multiply
    30,825.20x = 42,527.40 × 20,220.68
  4. Step 4: Simplify right side
    30,825.20x = 859,932,946.63
  5. Step 5: Solve for x
    x = 859,932,946.63/30,825.20
  6. Step 6: Final answer
    x = 27,897.08

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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.