Home / 13,403.34-18,490.55-8,368.81

Finding the Fourth Proportional to 13,403.34, 18,490.55 and 8,368.81

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Solution

The fourth proportional to 13,403.34, 18,490.55 and 8,368.81 is: 11,545.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,403.34 : 18,490.55 = 8,368.81 : x
  2. Step 2: Convert to fraction form
    13,403.34/18,490.55 = 8,368.81/x
  3. Step 3: Cross multiply
    13,403.34x = 18,490.55 × 8,368.81
  4. Step 4: Simplify right side
    13,403.34x = 154,743,811.68
  5. Step 5: Solve for x
    x = 154,743,811.68/13,403.34
  6. Step 6: Final answer
    x = 11,545.17

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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.