Home / 28,637.05-42,945.28-9,912

Finding the Fourth Proportional to 28,637.05, 42,945.28 and 9,912

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Solution

The fourth proportional to 28,637.05, 42,945.28 and 9,912 is: 14,864.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,637.05 : 42,945.28 = 9,912 : x
  2. Step 2: Convert to fraction form
    28,637.05/42,945.28 = 9,912/x
  3. Step 3: Cross multiply
    28,637.05x = 42,945.28 × 9,912
  4. Step 4: Simplify right side
    28,637.05x = 425,673,565.80
  5. Step 5: Solve for x
    x = 425,673,565.80/28,637.05
  6. Step 6: Final answer
    x = 14,864.43

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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.