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Finding the Fourth Proportional to 28,473.81, 42,710.71 and 7,413.79

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Solution

The fourth proportional to 28,473.81, 42,710.71 and 7,413.79 is: 11,120.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,473.81 : 42,710.71 = 7,413.79 : x
  2. Step 2: Convert to fraction form
    28,473.81/42,710.71 = 7,413.79/x
  3. Step 3: Cross multiply
    28,473.81x = 42,710.71 × 7,413.79
  4. Step 4: Simplify right side
    28,473.81x = 316,648,102.79
  5. Step 5: Solve for x
    x = 316,648,102.79/28,473.81
  6. Step 6: Final answer
    x = 11,120.68

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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.