Home / 13,621.19-20,423.85-5,291.45

Finding the Fourth Proportional to 13,621.19, 20,423.85 and 5,291.45

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Solution

The fourth proportional to 13,621.19, 20,423.85 and 5,291.45 is: 7,934.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.19 : 20,423.85 = 5,291.45 : x
  2. Step 2: Convert to fraction form
    13,621.19/20,423.85 = 5,291.45/x
  3. Step 3: Cross multiply
    13,621.19x = 20,423.85 × 5,291.45
  4. Step 4: Simplify right side
    13,621.19x = 108,071,678.96
  5. Step 5: Solve for x
    x = 108,071,678.96/13,621.19
  6. Step 6: Final answer
    x = 7,934.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.