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Finding the Fourth Proportional to 15,374.10, 21,218.15 and 8,660.01

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Solution

The fourth proportional to 15,374.10, 21,218.15 and 8,660.01 is: 11,951.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,374.10 : 21,218.15 = 8,660.01 : x
  2. Step 2: Convert to fraction form
    15,374.10/21,218.15 = 8,660.01/x
  3. Step 3: Cross multiply
    15,374.10x = 21,218.15 × 8,660.01
  4. Step 4: Simplify right side
    15,374.10x = 183,749,492.40
  5. Step 5: Solve for x
    x = 183,749,492.40/15,374.10
  6. Step 6: Final answer
    x = 11,951.88

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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.