Home / 15,508.14-21,401.28-8,434.44

Finding the Fourth Proportional to 15,508.14, 21,401.28 and 8,434.44

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Solution

The fourth proportional to 15,508.14, 21,401.28 and 8,434.44 is: 11,639.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,508.14 : 21,401.28 = 8,434.44 : x
  2. Step 2: Convert to fraction form
    15,508.14/21,401.28 = 8,434.44/x
  3. Step 3: Cross multiply
    15,508.14x = 21,401.28 × 8,434.44
  4. Step 4: Simplify right side
    15,508.14x = 180,507,812.08
  5. Step 5: Solve for x
    x = 180,507,812.08/15,508.14
  6. Step 6: Final answer
    x = 11,639.55

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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.