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Finding the Fourth Proportional to 13,599.43, 18,762.45 and 8,564.11

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Solution

The fourth proportional to 13,599.43, 18,762.45 and 8,564.11 is: 11,815.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,599.43 : 18,762.45 = 8,564.11 : x
  2. Step 2: Convert to fraction form
    13,599.43/18,762.45 = 8,564.11/x
  3. Step 3: Cross multiply
    13,599.43x = 18,762.45 × 8,564.11
  4. Step 4: Simplify right side
    13,599.43x = 160,683,685.67
  5. Step 5: Solve for x
    x = 160,683,685.67/13,599.43
  6. Step 6: Final answer
    x = 11,815.47

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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.