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Finding the Fourth Proportional to 15,850.16, 21,871.08 and 8,776.40

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Solution

The fourth proportional to 15,850.16, 21,871.08 and 8,776.40 is: 12,110.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,850.16 : 21,871.08 = 8,776.40 : x
  2. Step 2: Convert to fraction form
    15,850.16/21,871.08 = 8,776.40/x
  3. Step 3: Cross multiply
    15,850.16x = 21,871.08 × 8,776.40
  4. Step 4: Simplify right side
    15,850.16x = 191,949,346.51
  5. Step 5: Solve for x
    x = 191,949,346.51/15,850.16
  6. Step 6: Final answer
    x = 12,110.25

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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.