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Finding the Fourth Proportional to 15,868.22, 21,894.99 and 9,580.94

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Solution

The fourth proportional to 15,868.22, 21,894.99 and 9,580.94 is: 13,219.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,868.22 : 21,894.99 = 9,580.94 : x
  2. Step 2: Convert to fraction form
    15,868.22/21,894.99 = 9,580.94/x
  3. Step 3: Cross multiply
    15,868.22x = 21,894.99 × 9,580.94
  4. Step 4: Simplify right side
    15,868.22x = 209,774,585.49
  5. Step 5: Solve for x
    x = 209,774,585.49/15,868.22
  6. Step 6: Final answer
    x = 13,219.79

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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.