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Finding the Fourth Proportional to 15,551.56, 21,461.72 and 8,838.32

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Solution

The fourth proportional to 15,551.56, 21,461.72 and 8,838.32 is: 12,197.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,551.56 : 21,461.72 = 8,838.32 : x
  2. Step 2: Convert to fraction form
    15,551.56/21,461.72 = 8,838.32/x
  3. Step 3: Cross multiply
    15,551.56x = 21,461.72 × 8,838.32
  4. Step 4: Simplify right side
    15,551.56x = 189,685,549.11
  5. Step 5: Solve for x
    x = 189,685,549.11/15,551.56
  6. Step 6: Final answer
    x = 12,197.20

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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.