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Finding the Fourth Proportional to 28,637.21, 42,945.51 and 9,912.16

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Solution

The fourth proportional to 28,637.21, 42,945.51 and 9,912.16 is: 14,864.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,637.21 : 42,945.51 = 9,912.16 : x
  2. Step 2: Convert to fraction form
    28,637.21/42,945.51 = 9,912.16/x
  3. Step 3: Cross multiply
    28,637.21x = 42,945.51 × 9,912.16
  4. Step 4: Simplify right side
    28,637.21x = 425,682,766.40
  5. Step 5: Solve for x
    x = 425,682,766.40/28,637.21
  6. Step 6: Final answer
    x = 14,864.67

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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.