Home / 20,601.29-28,421.74-13,439.62

Finding the Fourth Proportional to 20,601.29, 28,421.74 and 13,439.62

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Solution

The fourth proportional to 20,601.29, 28,421.74 and 13,439.62 is: 18,541.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,601.29 : 28,421.74 = 13,439.62 : x
  2. Step 2: Convert to fraction form
    20,601.29/28,421.74 = 13,439.62/x
  3. Step 3: Cross multiply
    20,601.29x = 28,421.74 × 13,439.62
  4. Step 4: Simplify right side
    20,601.29x = 381,977,362.07
  5. Step 5: Solve for x
    x = 381,977,362.07/20,601.29
  6. Step 6: Final answer
    x = 18,541.43

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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.