Home / 20,572.37-30,870.88-18,899.31

Finding the Fourth Proportional to 20,572.37, 30,870.88 and 18,899.31

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Solution

The fourth proportional to 20,572.37, 30,870.88 and 18,899.31 is: 28,360.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.37 : 30,870.88 = 18,899.31 : x
  2. Step 2: Convert to fraction form
    20,572.37/30,870.88 = 18,899.31/x
  3. Step 3: Cross multiply
    20,572.37x = 30,870.88 × 18,899.31
  4. Step 4: Simplify right side
    20,572.37x = 583,438,399.61
  5. Step 5: Solve for x
    x = 583,438,399.61/20,572.37
  6. Step 6: Final answer
    x = 28,360.29

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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.