Home / 21,685.86-32,494.77-12,915.99

Finding the Fourth Proportional to 21,685.86, 32,494.77 and 12,915.99

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Solution

The fourth proportional to 21,685.86, 32,494.77 and 12,915.99 is: 19,353.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,685.86 : 32,494.77 = 12,915.99 : x
  2. Step 2: Convert to fraction form
    21,685.86/32,494.77 = 12,915.99/x
  3. Step 3: Cross multiply
    21,685.86x = 32,494.77 × 12,915.99
  4. Step 4: Simplify right side
    21,685.86x = 419,702,124.37
  5. Step 5: Solve for x
    x = 419,702,124.37/21,685.86
  6. Step 6: Final answer
    x = 19,353.72

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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.