Home / 28,359.29-42,545.30-8,639.39

Finding the Fourth Proportional to 28,359.29, 42,545.30 and 8,639.39

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Solution

The fourth proportional to 28,359.29, 42,545.30 and 8,639.39 is: 12,961.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,359.29 : 42,545.30 = 8,639.39 : x
  2. Step 2: Convert to fraction form
    28,359.29/42,545.30 = 8,639.39/x
  3. Step 3: Cross multiply
    28,359.29x = 42,545.30 × 8,639.39
  4. Step 4: Simplify right side
    28,359.29x = 367,565,502.53
  5. Step 5: Solve for x
    x = 367,565,502.53/28,359.29
  6. Step 6: Final answer
    x = 12,961.03

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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.