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Finding the Fourth Proportional to 15,070.34, 20,796.96 and 8,355.96

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Solution

The fourth proportional to 15,070.34, 20,796.96 and 8,355.96 is: 11,531.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,070.34 : 20,796.96 = 8,355.96 : x
  2. Step 2: Convert to fraction form
    15,070.34/20,796.96 = 8,355.96/x
  3. Step 3: Cross multiply
    15,070.34x = 20,796.96 × 8,355.96
  4. Step 4: Simplify right side
    15,070.34x = 173,778,643.87
  5. Step 5: Solve for x
    x = 173,778,643.87/15,070.34
  6. Step 6: Final answer
    x = 11,531.17

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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.