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Finding the Fourth Proportional to 15,106.40, 20,846.40 and 8,818.40

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Solution

The fourth proportional to 15,106.40, 20,846.40 and 8,818.40 is: 12,169.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,106.40 : 20,846.40 = 8,818.40 : x
  2. Step 2: Convert to fraction form
    15,106.40/20,846.40 = 8,818.40/x
  3. Step 3: Cross multiply
    15,106.40x = 20,846.40 × 8,818.40
  4. Step 4: Simplify right side
    15,106.40x = 183,831,893.76
  5. Step 5: Solve for x
    x = 183,831,893.76/15,106.40
  6. Step 6: Final answer
    x = 12,169.14

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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.