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Finding the Fourth Proportional to 18,931.68, 28,384.08 and 7,235.04

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Solution

The fourth proportional to 18,931.68, 28,384.08 and 7,235.04 is: 10,847.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.68 : 28,384.08 = 7,235.04 : x
  2. Step 2: Convert to fraction form
    18,931.68/28,384.08 = 7,235.04/x
  3. Step 3: Cross multiply
    18,931.68x = 28,384.08 × 7,235.04
  4. Step 4: Simplify right side
    18,931.68x = 205,359,954.16
  5. Step 5: Solve for x
    x = 205,359,954.16/18,931.68
  6. Step 6: Final answer
    x = 10,847.42

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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.