Home / 13,688.23-18,898.41-9,905.53

Finding the Fourth Proportional to 13,688.23, 18,898.41 and 9,905.53

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Solution

The fourth proportional to 13,688.23, 18,898.41 and 9,905.53 is: 13,675.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,688.23 : 18,898.41 = 9,905.53 : x
  2. Step 2: Convert to fraction form
    13,688.23/18,898.41 = 9,905.53/x
  3. Step 3: Cross multiply
    13,688.23x = 18,898.41 × 9,905.53
  4. Step 4: Simplify right side
    13,688.23x = 187,198,767.21
  5. Step 5: Solve for x
    x = 187,198,767.21/13,688.23
  6. Step 6: Final answer
    x = 13,675.89

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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.