Home / 20,745.68-31,056.12-18,970.64

Finding the Fourth Proportional to 20,745.68, 31,056.12 and 18,970.64

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Solution

The fourth proportional to 20,745.68, 31,056.12 and 18,970.64 is: 28,398.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.68 : 31,056.12 = 18,970.64 : x
  2. Step 2: Convert to fraction form
    20,745.68/31,056.12 = 18,970.64/x
  3. Step 3: Cross multiply
    20,745.68x = 31,056.12 × 18,970.64
  4. Step 4: Simplify right side
    20,745.68x = 589,154,472.32
  5. Step 5: Solve for x
    x = 589,154,472.32/20,745.68
  6. Step 6: Final answer
    x = 28,398.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.