Home / 28,158.72-42,239.48-8,435.40

Finding the Fourth Proportional to 28,158.72, 42,239.48 and 8,435.40

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Solution

The fourth proportional to 28,158.72, 42,239.48 and 8,435.40 is: 12,653.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,158.72 : 42,239.48 = 8,435.40 : x
  2. Step 2: Convert to fraction form
    28,158.72/42,239.48 = 8,435.40/x
  3. Step 3: Cross multiply
    28,158.72x = 42,239.48 × 8,435.40
  4. Step 4: Simplify right side
    28,158.72x = 356,306,930.68
  5. Step 5: Solve for x
    x = 356,306,930.68/28,158.72
  6. Step 6: Final answer
    x = 12,653.52

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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.