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Finding the Fourth Proportional to 15,889.77, 21,921.03 and 9,598.50

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Solution

The fourth proportional to 15,889.77, 21,921.03 and 9,598.50 is: 13,241.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,889.77 : 21,921.03 = 9,598.50 : x
  2. Step 2: Convert to fraction form
    15,889.77/21,921.03 = 9,598.50/x
  3. Step 3: Cross multiply
    15,889.77x = 21,921.03 × 9,598.50
  4. Step 4: Simplify right side
    15,889.77x = 210,409,006.46
  5. Step 5: Solve for x
    x = 210,409,006.46/15,889.77
  6. Step 6: Final answer
    x = 13,241.79

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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.