Home / 13,490.10-18,618.78-8,715.96

Finding the Fourth Proportional to 13,490.10, 18,618.78 and 8,715.96

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Solution

The fourth proportional to 13,490.10, 18,618.78 and 8,715.96 is: 12,029.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,490.10 : 18,618.78 = 8,715.96 : x
  2. Step 2: Convert to fraction form
    13,490.10/18,618.78 = 8,715.96/x
  3. Step 3: Cross multiply
    13,490.10x = 18,618.78 × 8,715.96
  4. Step 4: Simplify right side
    13,490.10x = 162,280,541.73
  5. Step 5: Solve for x
    x = 162,280,541.73/13,490.10
  6. Step 6: Final answer
    x = 12,029.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.