Home / 18,348.10-25,318.65-12,688.90

Finding the Fourth Proportional to 18,348.10, 25,318.65 and 12,688.90

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Solution

The fourth proportional to 18,348.10, 25,318.65 and 12,688.90 is: 17,509.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,348.10 : 25,318.65 = 12,688.90 : x
  2. Step 2: Convert to fraction form
    18,348.10/25,318.65 = 12,688.90/x
  3. Step 3: Cross multiply
    18,348.10x = 25,318.65 × 12,688.90
  4. Step 4: Simplify right side
    18,348.10x = 321,265,817.99
  5. Step 5: Solve for x
    x = 321,265,817.99/18,348.10
  6. Step 6: Final answer
    x = 17,509.49

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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.