Home / 13,416.39-18,501.75-8,631.45

Finding the Fourth Proportional to 13,416.39, 18,501.75 and 8,631.45

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Solution

The fourth proportional to 13,416.39, 18,501.75 and 8,631.45 is: 11,903.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,416.39 : 18,501.75 = 8,631.45 : x
  2. Step 2: Convert to fraction form
    13,416.39/18,501.75 = 8,631.45/x
  3. Step 3: Cross multiply
    13,416.39x = 18,501.75 × 8,631.45
  4. Step 4: Simplify right side
    13,416.39x = 159,696,930.04
  5. Step 5: Solve for x
    x = 159,696,930.04/13,416.39
  6. Step 6: Final answer
    x = 11,903.12

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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.