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Finding the Fourth Proportional to 13,592.81, 20,400.15 and 7,020.88

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Solution

The fourth proportional to 13,592.81, 20,400.15 and 7,020.88 is: 10,536.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,592.81 : 20,400.15 = 7,020.88 : x
  2. Step 2: Convert to fraction form
    13,592.81/20,400.15 = 7,020.88/x
  3. Step 3: Cross multiply
    13,592.81x = 20,400.15 × 7,020.88
  4. Step 4: Simplify right side
    13,592.81x = 143,226,980.46
  5. Step 5: Solve for x
    x = 143,226,980.46/13,592.81
  6. Step 6: Final answer
    x = 10,536.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.