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Finding the Fourth Proportional to 17,611.40, 26,438.70 and 9,720.20

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Solution

The fourth proportional to 17,611.40, 26,438.70 and 9,720.20 is: 14,592.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,611.40 : 26,438.70 = 9,720.20 : x
  2. Step 2: Convert to fraction form
    17,611.40/26,438.70 = 9,720.20/x
  3. Step 3: Cross multiply
    17,611.40x = 26,438.70 × 9,720.20
  4. Step 4: Simplify right side
    17,611.40x = 256,989,451.74
  5. Step 5: Solve for x
    x = 256,989,451.74/17,611.40
  6. Step 6: Final answer
    x = 14,592.22

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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.