Home / 25,740.38-35,542.40-20,688.41

Finding the Fourth Proportional to 25,740.38, 35,542.40 and 20,688.41

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Solution

The fourth proportional to 25,740.38, 35,542.40 and 20,688.41 is: 28,566.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,740.38 : 35,542.40 = 20,688.41 : x
  2. Step 2: Convert to fraction form
    25,740.38/35,542.40 = 20,688.41/x
  3. Step 3: Cross multiply
    25,740.38x = 35,542.40 × 20,688.41
  4. Step 4: Simplify right side
    25,740.38x = 735,315,729.00
  5. Step 5: Solve for x
    x = 735,315,729.00/25,740.38
  6. Step 6: Final answer
    x = 28,566.62

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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.