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Finding the Fourth Proportional to 18,655.98, 27,988.14 and 9,889.08

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Solution

The fourth proportional to 18,655.98, 27,988.14 and 9,889.08 is: 14,835.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,655.98 : 27,988.14 = 9,889.08 : x
  2. Step 2: Convert to fraction form
    18,655.98/27,988.14 = 9,889.08/x
  3. Step 3: Cross multiply
    18,655.98x = 27,988.14 × 9,889.08
  4. Step 4: Simplify right side
    18,655.98x = 276,776,955.51
  5. Step 5: Solve for x
    x = 276,776,955.51/18,655.98
  6. Step 6: Final answer
    x = 14,835.83

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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.