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Finding the Fourth Proportional to 28,637.36, 42,945.74 and 9,912.32

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Solution

The fourth proportional to 28,637.36, 42,945.74 and 9,912.32 is: 14,864.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,637.36 : 42,945.74 = 9,912.32 : x
  2. Step 2: Convert to fraction form
    28,637.36/42,945.74 = 9,912.32/x
  3. Step 3: Cross multiply
    28,637.36x = 42,945.74 × 9,912.32
  4. Step 4: Simplify right side
    28,637.36x = 425,691,917.52
  5. Step 5: Solve for x
    x = 425,691,917.52/28,637.36
  6. Step 6: Final answer
    x = 14,864.91

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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.