Home / 28,110.40-42,165.60-18,779.20

Finding the Fourth Proportional to 28,110.40, 42,165.60 and 18,779.20

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Solution

The fourth proportional to 28,110.40, 42,165.60 and 18,779.20 is: 28,168.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,110.40 : 42,165.60 = 18,779.20 : x
  2. Step 2: Convert to fraction form
    28,110.40/42,165.60 = 18,779.20/x
  3. Step 3: Cross multiply
    28,110.40x = 42,165.60 × 18,779.20
  4. Step 4: Simplify right side
    28,110.40x = 791,836,235.52
  5. Step 5: Solve for x
    x = 791,836,235.52/28,110.40
  6. Step 6: Final answer
    x = 28,168.80

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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.