Home / 13,346.91-18,420.11-7,681.87

Finding the Fourth Proportional to 13,346.91, 18,420.11 and 7,681.87

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Solution

The fourth proportional to 13,346.91, 18,420.11 and 7,681.87 is: 10,601.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,346.91 : 18,420.11 = 7,681.87 : x
  2. Step 2: Convert to fraction form
    13,346.91/18,420.11 = 7,681.87/x
  3. Step 3: Cross multiply
    13,346.91x = 18,420.11 × 7,681.87
  4. Step 4: Simplify right side
    13,346.91x = 141,500,903.83
  5. Step 5: Solve for x
    x = 141,500,903.83/13,346.91
  6. Step 6: Final answer
    x = 10,601.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.