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Finding the Fourth Proportional to 13,402.76, 18,495.95 and 7,434.81

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Solution

The fourth proportional to 13,402.76, 18,495.95 and 7,434.81 is: 10,260.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,402.76 : 18,495.95 = 7,434.81 : x
  2. Step 2: Convert to fraction form
    13,402.76/18,495.95 = 7,434.81/x
  3. Step 3: Cross multiply
    13,402.76x = 18,495.95 × 7,434.81
  4. Step 4: Simplify right side
    13,402.76x = 137,513,836.85
  5. Step 5: Solve for x
    x = 137,513,836.85/13,402.76
  6. Step 6: Final answer
    x = 10,260.12

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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.