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Finding the Fourth Proportional to 21,860.76, 32,783.10 and 7,816.98

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Solution

The fourth proportional to 21,860.76, 32,783.10 and 7,816.98 is: 11,722.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,860.76 : 32,783.10 = 7,816.98 : x
  2. Step 2: Convert to fraction form
    21,860.76/32,783.10 = 7,816.98/x
  3. Step 3: Cross multiply
    21,860.76x = 32,783.10 × 7,816.98
  4. Step 4: Simplify right side
    21,860.76x = 256,264,904.41
  5. Step 5: Solve for x
    x = 256,264,904.41/21,860.76
  6. Step 6: Final answer
    x = 11,722.60

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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.