Home / 28,355.40-42,546.60-18,999.90

Finding the Fourth Proportional to 28,355.40, 42,546.60 and 18,999.90

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Solution

The fourth proportional to 28,355.40, 42,546.60 and 18,999.90 is: 28,508.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,355.40 : 42,546.60 = 18,999.90 : x
  2. Step 2: Convert to fraction form
    28,355.40/42,546.60 = 18,999.90/x
  3. Step 3: Cross multiply
    28,355.40x = 42,546.60 × 18,999.90
  4. Step 4: Simplify right side
    28,355.40x = 808,381,145.34
  5. Step 5: Solve for x
    x = 808,381,145.34/28,355.40
  6. Step 6: Final answer
    x = 28,508.90

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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.