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Finding the Fourth Proportional to 28,421.51, 42,632.09 and 7,361.49

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Solution

The fourth proportional to 28,421.51, 42,632.09 and 7,361.49 is: 11,042.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.51 : 42,632.09 = 7,361.49 : x
  2. Step 2: Convert to fraction form
    28,421.51/42,632.09 = 7,361.49/x
  3. Step 3: Cross multiply
    28,421.51x = 42,632.09 × 7,361.49
  4. Step 4: Simplify right side
    28,421.51x = 313,835,667.41
  5. Step 5: Solve for x
    x = 313,835,667.41/28,421.51
  6. Step 6: Final answer
    x = 11,042.19

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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.