Home / 15,508.06-21,401.34-8,434.48

Finding the Fourth Proportional to 15,508.06, 21,401.34 and 8,434.48

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Solution

The fourth proportional to 15,508.06, 21,401.34 and 8,434.48 is: 11,639.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,508.06 : 21,401.34 = 8,434.48 : x
  2. Step 2: Convert to fraction form
    15,508.06/21,401.34 = 8,434.48/x
  3. Step 3: Cross multiply
    15,508.06x = 21,401.34 × 8,434.48
  4. Step 4: Simplify right side
    15,508.06x = 180,509,174.20
  5. Step 5: Solve for x
    x = 180,509,174.20/15,508.06
  6. Step 6: Final answer
    x = 11,639.70

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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.