Home / 12,638.81-18,928.67-9,988.52

Finding the Fourth Proportional to 12,638.81, 18,928.67 and 9,988.52

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Solution

The fourth proportional to 12,638.81, 18,928.67 and 9,988.52 is: 14,959.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638.81 : 18,928.67 = 9,988.52 : x
  2. Step 2: Convert to fraction form
    12,638.81/18,928.67 = 9,988.52/x
  3. Step 3: Cross multiply
    12,638.81x = 18,928.67 × 9,988.52
  4. Step 4: Simplify right side
    12,638.81x = 189,069,484.87
  5. Step 5: Solve for x
    x = 189,069,484.87/12,638.81
  6. Step 6: Final answer
    x = 14,959.44

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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.