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Finding the Fourth Proportional to 12,612.40, 18,915.54 and 5,588.54

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Solution

The fourth proportional to 12,612.40, 18,915.54 and 5,588.54 is: 8,381.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.40 : 18,915.54 = 5,588.54 : x
  2. Step 2: Convert to fraction form
    12,612.40/18,915.54 = 5,588.54/x
  3. Step 3: Cross multiply
    12,612.40x = 18,915.54 × 5,588.54
  4. Step 4: Simplify right side
    12,612.40x = 105,710,251.91
  5. Step 5: Solve for x
    x = 105,710,251.91/12,612.40
  6. Step 6: Final answer
    x = 8,381.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.