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Finding the Fourth Proportional to 15,637.95, 21,579.56 and 8,563.01

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Solution

The fourth proportional to 15,637.95, 21,579.56 and 8,563.01 is: 11,816.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,637.95 : 21,579.56 = 8,563.01 : x
  2. Step 2: Convert to fraction form
    15,637.95/21,579.56 = 8,563.01/x
  3. Step 3: Cross multiply
    15,637.95x = 21,579.56 × 8,563.01
  4. Step 4: Simplify right side
    15,637.95x = 184,785,837.36
  5. Step 5: Solve for x
    x = 184,785,837.36/15,637.95
  6. Step 6: Final answer
    x = 11,816.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.