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Finding the Fourth Proportional to 15,611.61, 23,429.72 and 8,220.45

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Solution

The fourth proportional to 15,611.61, 23,429.72 and 8,220.45 is: 12,337.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,611.61 : 23,429.72 = 8,220.45 : x
  2. Step 2: Convert to fraction form
    15,611.61/23,429.72 = 8,220.45/x
  3. Step 3: Cross multiply
    15,611.61x = 23,429.72 × 8,220.45
  4. Step 4: Simplify right side
    15,611.61x = 192,602,800.67
  5. Step 5: Solve for x
    x = 192,602,800.67/15,611.61
  6. Step 6: Final answer
    x = 12,337.15

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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.