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Finding the Fourth Proportional to 15,508.59, 21,401.88 and 8,435.01

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Solution

The fourth proportional to 15,508.59, 21,401.88 and 8,435.01 is: 11,640.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,508.59 : 21,401.88 = 8,435.01 : x
  2. Step 2: Convert to fraction form
    15,508.59/21,401.88 = 8,435.01/x
  3. Step 3: Cross multiply
    15,508.59x = 21,401.88 × 8,435.01
  4. Step 4: Simplify right side
    15,508.59x = 180,525,071.82
  5. Step 5: Solve for x
    x = 180,525,071.82/15,508.59
  6. Step 6: Final answer
    x = 11,640.33

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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.