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Finding the Fourth Proportional to 13,707.63, 18,916.94 and 8,602.20

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Solution

The fourth proportional to 13,707.63, 18,916.94 and 8,602.20 is: 11,871.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,707.63 : 18,916.94 = 8,602.20 : x
  2. Step 2: Convert to fraction form
    13,707.63/18,916.94 = 8,602.20/x
  3. Step 3: Cross multiply
    13,707.63x = 18,916.94 × 8,602.20
  4. Step 4: Simplify right side
    13,707.63x = 162,727,322.77
  5. Step 5: Solve for x
    x = 162,727,322.77/13,707.63
  6. Step 6: Final answer
    x = 11,871.30

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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.