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Finding the Fourth Proportional to 15,607.88, 21,538.88 and 8,534.36

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Solution

The fourth proportional to 15,607.88, 21,538.88 and 8,534.36 is: 11,777.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,607.88 : 21,538.88 = 8,534.36 : x
  2. Step 2: Convert to fraction form
    15,607.88/21,538.88 = 8,534.36/x
  3. Step 3: Cross multiply
    15,607.88x = 21,538.88 × 8,534.36
  4. Step 4: Simplify right side
    15,607.88x = 183,820,555.92
  5. Step 5: Solve for x
    x = 183,820,555.92/15,607.88
  6. Step 6: Final answer
    x = 11,777.42

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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.