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Finding the Fourth Proportional to 15,699.01, 21,664.55 and 8,528.87

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Solution

The fourth proportional to 15,699.01, 21,664.55 and 8,528.87 is: 11,769.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,699.01 : 21,664.55 = 8,528.87 : x
  2. Step 2: Convert to fraction form
    15,699.01/21,664.55 = 8,528.87/x
  3. Step 3: Cross multiply
    15,699.01x = 21,664.55 × 8,528.87
  4. Step 4: Simplify right side
    15,699.01x = 184,773,979.59
  5. Step 5: Solve for x
    x = 184,773,979.59/15,699.01
  6. Step 6: Final answer
    x = 11,769.79

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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.