Home / 15,506.79-21,399.45-9,219.21

Finding the Fourth Proportional to 15,506.79, 21,399.45 and 9,219.21

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Solution

The fourth proportional to 15,506.79, 21,399.45 and 9,219.21 is: 12,722.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,506.79 : 21,399.45 = 9,219.21 : x
  2. Step 2: Convert to fraction form
    15,506.79/21,399.45 = 9,219.21/x
  3. Step 3: Cross multiply
    15,506.79x = 21,399.45 × 9,219.21
  4. Step 4: Simplify right side
    15,506.79x = 197,286,023.43
  5. Step 5: Solve for x
    x = 197,286,023.43/15,506.79
  6. Step 6: Final answer
    x = 12,722.56

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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.