Home / 28,380.02-42,576.21-8,658.05

Finding the Fourth Proportional to 28,380.02, 42,576.21 and 8,658.05

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Solution

The fourth proportional to 28,380.02, 42,576.21 and 8,658.05 is: 12,988.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.02 : 42,576.21 = 8,658.05 : x
  2. Step 2: Convert to fraction form
    28,380.02/42,576.21 = 8,658.05/x
  3. Step 3: Cross multiply
    28,380.02x = 42,576.21 × 8,658.05
  4. Step 4: Simplify right side
    28,380.02x = 368,626,742.11
  5. Step 5: Solve for x
    x = 368,626,742.11/28,380.02
  6. Step 6: Final answer
    x = 12,988.96

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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.