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Finding the Fourth Proportional to 18,710.10, 28,065.11 and 7,614.32

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Solution

The fourth proportional to 18,710.10, 28,065.11 and 7,614.32 is: 11,421.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.10 : 28,065.11 = 7,614.32 : x
  2. Step 2: Convert to fraction form
    18,710.10/28,065.11 = 7,614.32/x
  3. Step 3: Cross multiply
    18,710.10x = 28,065.11 × 7,614.32
  4. Step 4: Simplify right side
    18,710.10x = 213,696,549.98
  5. Step 5: Solve for x
    x = 213,696,549.98/18,710.10
  6. Step 6: Final answer
    x = 11,421.45

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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.