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Finding the Fourth Proportional to 13,402.59, 18,489.51 and 8,368.07

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Solution

The fourth proportional to 13,402.59, 18,489.51 and 8,368.07 is: 11,544.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,402.59 : 18,489.51 = 8,368.07 : x
  2. Step 2: Convert to fraction form
    13,402.59/18,489.51 = 8,368.07/x
  3. Step 3: Cross multiply
    13,402.59x = 18,489.51 × 8,368.07
  4. Step 4: Simplify right side
    13,402.59x = 154,721,421.50
  5. Step 5: Solve for x
    x = 154,721,421.50/13,402.59
  6. Step 6: Final answer
    x = 11,544.14

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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.