Home / 13,506.21-18,612.79-9,722.70

Finding the Fourth Proportional to 13,506.21, 18,612.79 and 9,722.70

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Solution

The fourth proportional to 13,506.21, 18,612.79 and 9,722.70 is: 13,398.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,506.21 : 18,612.79 = 9,722.70 : x
  2. Step 2: Convert to fraction form
    13,506.21/18,612.79 = 9,722.70/x
  3. Step 3: Cross multiply
    13,506.21x = 18,612.79 × 9,722.70
  4. Step 4: Simplify right side
    13,506.21x = 180,966,549.03
  5. Step 5: Solve for x
    x = 180,966,549.03/13,506.21
  6. Step 6: Final answer
    x = 13,398.77

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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.