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Finding the Fourth Proportional to 15,559, 21,479.08 and 10,782.56

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Solution

The fourth proportional to 15,559, 21,479.08 and 10,782.56 is: 14,885.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,559 : 21,479.08 = 10,782.56 : x
  2. Step 2: Convert to fraction form
    15,559/21,479.08 = 10,782.56/x
  3. Step 3: Cross multiply
    15,559x = 21,479.08 × 10,782.56
  4. Step 4: Simplify right side
    15,559x = 231,599,468.84
  5. Step 5: Solve for x
    x = 231,599,468.84/15,559
  6. Step 6: Final answer
    x = 14,885.24

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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.