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Finding the Fourth Proportional to 15,919.12, 21,965.94 and 9,203.45

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Solution

The fourth proportional to 15,919.12, 21,965.94 and 9,203.45 is: 12,699.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,919.12 : 21,965.94 = 9,203.45 : x
  2. Step 2: Convert to fraction form
    15,919.12/21,965.94 = 9,203.45/x
  3. Step 3: Cross multiply
    15,919.12x = 21,965.94 × 9,203.45
  4. Step 4: Simplify right side
    15,919.12x = 202,162,430.49
  5. Step 5: Solve for x
    x = 202,162,430.49/15,919.12
  6. Step 6: Final answer
    x = 12,699.35

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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.