Home / 28,115.96-42,185.60-12,312.83

Finding the Fourth Proportional to 28,115.96, 42,185.60 and 12,312.83

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Solution

The fourth proportional to 28,115.96, 42,185.60 and 12,312.83 is: 18,474.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.96 : 42,185.60 = 12,312.83 : x
  2. Step 2: Convert to fraction form
    28,115.96/42,185.60 = 12,312.83/x
  3. Step 3: Cross multiply
    28,115.96x = 42,185.60 × 12,312.83
  4. Step 4: Simplify right side
    28,115.96x = 519,423,941.10
  5. Step 5: Solve for x
    x = 519,423,941.10/28,115.96
  6. Step 6: Final answer
    x = 18,474.34

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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.