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Finding the Fourth Proportional to 15,855.77, 21,880.98 and 8,782.04

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Solution

The fourth proportional to 15,855.77, 21,880.98 and 8,782.04 is: 12,119.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,855.77 : 21,880.98 = 8,782.04 : x
  2. Step 2: Convert to fraction form
    15,855.77/21,880.98 = 8,782.04/x
  3. Step 3: Cross multiply
    15,855.77x = 21,880.98 × 8,782.04
  4. Step 4: Simplify right side
    15,855.77x = 192,159,532.19
  5. Step 5: Solve for x
    x = 192,159,532.19/15,855.77
  6. Step 6: Final answer
    x = 12,119.22

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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.