Home / 28,158.21-42,291.99-20,733.35

Finding the Fourth Proportional to 28,158.21, 42,291.99 and 20,733.35

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Solution

The fourth proportional to 28,158.21, 42,291.99 and 20,733.35 is: 31,140.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,158.21 : 42,291.99 = 20,733.35 : x
  2. Step 2: Convert to fraction form
    28,158.21/42,291.99 = 20,733.35/x
  3. Step 3: Cross multiply
    28,158.21x = 42,291.99 × 20,733.35
  4. Step 4: Simplify right side
    28,158.21x = 876,854,630.87
  5. Step 5: Solve for x
    x = 876,854,630.87/28,158.21
  6. Step 6: Final answer
    x = 31,140.28

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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.