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Finding the Fourth Proportional to 10,618.80, 15,923.40 and 4,772.40

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Solution

The fourth proportional to 10,618.80, 15,923.40 and 4,772.40 is: 7,156.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,618.80 : 15,923.40 = 4,772.40 : x
  2. Step 2: Convert to fraction form
    10,618.80/15,923.40 = 4,772.40/x
  3. Step 3: Cross multiply
    10,618.80x = 15,923.40 × 4,772.40
  4. Step 4: Simplify right side
    10,618.80x = 75,992,834.16
  5. Step 5: Solve for x
    x = 75,992,834.16/10,618.80
  6. Step 6: Final answer
    x = 7,156.44

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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.