Home / 15,540.90-21,439.10-10,506.89

Finding the Fourth Proportional to 15,540.90, 21,439.10 and 10,506.89

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Solution

The fourth proportional to 15,540.90, 21,439.10 and 10,506.89 is: 14,494.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,540.90 : 21,439.10 = 10,506.89 : x
  2. Step 2: Convert to fraction form
    15,540.90/21,439.10 = 10,506.89/x
  3. Step 3: Cross multiply
    15,540.90x = 21,439.10 × 10,506.89
  4. Step 4: Simplify right side
    15,540.90x = 225,258,105.67
  5. Step 5: Solve for x
    x = 225,258,105.67/15,540.90
  6. Step 6: Final answer
    x = 14,494.53

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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.