Home / 12,638.12-18,931.81-6,293.89

Finding the Fourth Proportional to 12,638.12, 18,931.81 and 6,293.89

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Solution

The fourth proportional to 12,638.12, 18,931.81 and 6,293.89 is: 9,428.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638.12 : 18,931.81 = 6,293.89 : x
  2. Step 2: Convert to fraction form
    12,638.12/18,931.81 = 6,293.89/x
  3. Step 3: Cross multiply
    12,638.12x = 18,931.81 × 6,293.89
  4. Step 4: Simplify right side
    12,638.12x = 119,154,603.51
  5. Step 5: Solve for x
    x = 119,154,603.51/12,638.12
  6. Step 6: Final answer
    x = 9,428.19

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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.