Home / 13,291.73-19,937.61-12,479.81

Finding the Fourth Proportional to 13,291.73, 19,937.61 and 12,479.81

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Solution

The fourth proportional to 13,291.73, 19,937.61 and 12,479.81 is: 18,719.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,291.73 : 19,937.61 = 12,479.81 : x
  2. Step 2: Convert to fraction form
    13,291.73/19,937.61 = 12,479.81/x
  3. Step 3: Cross multiply
    13,291.73x = 19,937.61 × 12,479.81
  4. Step 4: Simplify right side
    13,291.73x = 248,817,484.97
  5. Step 5: Solve for x
    x = 248,817,484.97/13,291.73
  6. Step 6: Final answer
    x = 18,719.73

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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.