Home / 28,130.15-42,195.23-8,408.07

Finding the Fourth Proportional to 28,130.15, 42,195.23 and 8,408.07

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Solution

The fourth proportional to 28,130.15, 42,195.23 and 8,408.07 is: 12,612.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,130.15 : 42,195.23 = 8,408.07 : x
  2. Step 2: Convert to fraction form
    28,130.15/42,195.23 = 8,408.07/x
  3. Step 3: Cross multiply
    28,130.15x = 42,195.23 × 8,408.07
  4. Step 4: Simplify right side
    28,130.15x = 354,780,437.00
  5. Step 5: Solve for x
    x = 354,780,437.00/28,130.15
  6. Step 6: Final answer
    x = 12,612.11

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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.