Home / 13,291.85-19,937.81-12,479.93

Finding the Fourth Proportional to 13,291.85, 19,937.81 and 12,479.93

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Solution

The fourth proportional to 13,291.85, 19,937.81 and 12,479.93 is: 18,719.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,291.85 : 19,937.81 = 12,479.93 : x
  2. Step 2: Convert to fraction form
    13,291.85/19,937.81 = 12,479.93/x
  3. Step 3: Cross multiply
    13,291.85x = 19,937.81 × 12,479.93
  4. Step 4: Simplify right side
    13,291.85x = 248,822,410.75
  5. Step 5: Solve for x
    x = 248,822,410.75/13,291.85
  6. Step 6: Final answer
    x = 18,719.92

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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.